JP2005108055A - Commodity sell/buy management system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a customer to purchase a commodity matched with the using value of the commodity by releasing the buying price of the commodity before/after selling the commodity. <P>SOLUTION: Commodity information including the guaranteed amount of buying is presented as commodity information before selling the commodity and information including the buying price of the commodity is provided in the whole period that the customer owns the commodity after selling the commodity, so that the customer can make a purchase plan by a practical value matched with the using value of the commodity (a) and can use the commodity by the practical price matched with the using value of the commodity (b). The customer can make a selling plan by always comparing a selling price with a value obtained by owning and using the commodity continuously (c). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a technology for merchandise sales management and merchandise purchase management, and provides a method for providing information related to the purchase price of the merchandise before the sale and information relating to the purchase price of the merchandise for the merchandise after sale. It is about.

  In the past, there was a general distribution business that sells products and a used product distribution business that sells used products. These stores manage sales information such as sales for each product and customer purchase history, but whether the product after sale is still owned by the customer who purchased it or what the current value of the product is. It is not managed and information is not provided to customers.

In the prior application technology, after selling used books, there is a system aiming for early product purchase by presenting preferential purchase price for the early purchase of the product for a certain period, and presenting the purchase price of the owned product according to the above There is a system to do.
JP 2002-49810 A

  In the sale of some products, there is a case where the purchase is guaranteed within the range of the selling price for a certain period after the product is purchased.

  In the sale of high-priced products such as automobiles, the trade-in system for old products is common in the case of replacement.

  These have the following drawbacks. Except for products that disappear when consumed, such as groceries, and some products such as luxury and investment products that own value itself, the customer purchases the product for use. The customer's value for the product will change over time as follows: (B) The customer's value for the product decreases with the passage of time of use. (B) The use is terminated or cannot be used, and the customer's value for the product is reduced. (C) Customer values change and the value decreases significantly (gets tired, needs change, etc.). However, since the customer purchases on the assumption that he / she will continue to own the product, the customer will use the product because he / she owns a product that is not used or a product whose value of use has decreased.

  With conventional technology, customers can only make purchases based on the premise of possession of the product, and it is also difficult to make a target for the sale price of the product when purchasing the product. It is not possible to make a purchase plan at the time of purchase, and a sense of value is generated at the time of product purchase.

  In addition, with the conventional technology, for the products whose use value has been reduced for the above-mentioned customers, it is necessary to inquire the store where the customer actively purchases used products for information such as the price when selling, so the use value is reduced. There are many cases where products that have been sold are not sold.

  In addition, second-hand merchandise sellers have increased market value purchases for products for which there is a large demand and supply shortage, but the above-mentioned prior technology purchase system cannot handle the increase in market value purchases. An appropriate purchase price is not presented, and it becomes difficult for second-hand goods sellers to purchase goods that are insufficiently supplied. In addition, the above-mentioned prior application technology and the purchase guarantee system for a certain period found in some products are limited purchase guarantee systems for a certain period of time. Does not solve.

  Some products, such as automobiles and homes, are generally sold after use, but customers can only know the selling price of these products after they have actively collected information on their own. The information such as the sale price cannot be easily obtained at the time of purchasing the product or during the use of the product, and the sale cannot be executed systematically.

  In the second-hand market, even if it is a popular item with a small inventory, second-hand merchandise stores and second-hand merchandise stores do not have information on customers who own the merchandise, and purchase used books early. Even if the store has information, the purchase price is a preferential purchase price by early purchase that does not reflect the market price of the secondhand market, so no more effective purchase promotion measures can be implemented. As a result, in the second-hand market, sales opportunities are often missed due to a shortage of products, and the product recycling market is smaller than the social needs and customer needs, and is not fully satisfied.

  The purpose of the present invention is to enable the customer to substantially pay for the use of the product. For this purpose, the purchase guarantee amount of the product is presented at the time of purchasing the product or before the purchase. , Provide the customer with a real price for the value in use, and provide information on the purchase price of the product for the entire period of possession of the product after the purchase of the product, reducing the burden on the purchase of the product and the possession of the product In addition to providing a sense of security and reasonable prices for product purchases, this will lead to an increase in sales opportunities, as well as providing information on the purchase price of used products and smooth purchases to supply excellent second-hand products to the recycling market. In order to promote and promote the expansion of the recycling market, it is to provide technology related to the management of product sales and purchases.

  The invention described in claim 1 is a computer server that manages the sale and purchase of products that can be connected to a customer terminal or a store terminal in order to achieve the above object, and the computer server is a product that manages at least the products. A database, a sales / purchase database for managing product sales and purchase results, and a customer database for managing customers, the product database further comprising information on the guaranteed purchase price of the product after sales To do.

  In order to achieve the above object, the invention according to claim 2 is the merchandise sales / purchase management system according to claim 1, wherein the computer server extracts a merchandise purchase guarantee amount at the time of the merchandise sale or before the merchandise sale. And a means for presenting to the customer, and a means for recording the sales results when the product sale is established. After the sale of the product, the purchase guarantee presented at the time of sale of the product for the entire period until the product is purchased. Means for managing information including a forehead.

In order to achieve the above object, the invention according to claim 3 is the commodity sales / purchase management system according to claim 1 and claim 2, wherein the purchase price based on the market price of the commodity is stored in the commodity database in the computer server. Further information on (the market price of the product at that time) is further extracted, and the purchase price based on the market price (hereinafter referred to as the market price purchase price) is extracted together with the product purchase guarantee amount according to claim 1 and claim 2 And a means for selecting a higher price out of the guaranteed purchase price and the current price purchase price and presenting it to the customer.

  In order to achieve the above object, the invention according to claim 4 is the commodity sales / purchase management system according to claim 1, claim 2, and claim 3, wherein the computer server is a customer terminal, or Means for extracting products that have been sold to customers but not yet purchased (hereinafter referred to as unpurchased products) through inquiries from store terminals, and for the extracted unpurchased products, purchase guarantee amount information and market prices It is characterized by comprising means for extracting purchase amount information and means for providing the customer with information on the extracted unpurchased products.

  In order to achieve the above object, the invention according to claim 5 is the commodity sales / purchase management system according to claim 1, claim 2, or claim 3, wherein the computer server purchases the commodity from the customer. (B) Means for selecting whether or not the goods brought in are sold by presenting the purchase guarantee amount described in claim 2; (b) The goods sold by presenting the purchase guarantee amount In the case of, the means for extracting the purchase guarantee amount presented at the time of sale and the purchase guarantee amount applied at the time of inquiry, (c) means for extracting the market price purchase amount according to claim 3 for all products, ( (D) The above (b) is characterized by comprising means for selecting and presenting the higher price of the extracted guaranteed purchase price and the extracted current price purchase price.

  According to the present invention, since the sales price is known when the customer purchases the product, a sales plan can be made, so that it is possible to make a purchase plan at a payment price corresponding to the actual use value of the product, and the burden of purchasing the product is reduced. Is done.

  According to the present invention, the customer can easily obtain information on the purchase amount of goods during the entire period of use of the product regardless of the length of use of the product, and the real use value and its use corresponding to the use cycle of various products. Consumption behavior can be planned with a purchase plan with a real payment amount corresponding to the value.

According to the present invention, since the customer can easily understand the contents of the product and the sales price of the product for the entire period after the product purchase, the customer has an increased opportunity to choose whether to sell or own the product. In the future, it is expected that the customer's action to sell a product whose value has been reduced for the customer will increase, so that many excellent products can flow into the recycling market and contribute to the development of the recycling market.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a functional configuration diagram of the merchandise sales / purchase management system of the present invention. The management server 1 that executes the functions of the present invention is connected to various customer terminals 2 that can be connected to the Web via the Internet, a dedicated line, or a public line 4, and a store terminal 3 that is arranged in the store.

  The management server 1 can use a commercially available hardware device, and can be executed by providing a system to be described later as a function even when using a commercially available OS and database software of a commercially available application software.

  In this embodiment, as for the management server 1, one server machine performs all processes for customer management, product management, sales management, purchase management, customer terminal correspondence, and store terminal correspondence. You may carry out by distributing to a machine.

  The management server 1 includes a communication control unit 11, a control processing unit 16, a customer database 12, a product database 13, a sales / purchase database 14, and an unpurchased product database 15 as internal functions.

  The communication control unit 11 performs communication control between the customer terminal 2 and the store terminal 3.

  The management server 1 is configured to be able to connect to various customer terminals 2 capable of Web connection via the Internet 4 by processing of the communication control unit 11, and the customer terminal includes an input device 2A such as a keyboard. When connecting to the customer terminal 2, the communication control unit 11 accepts access from the customer terminal by the URL input by the input device 2A, and provides the customer terminal with a Web page including purchase information, which will be described later.

  A store terminal 3 such as a POS terminal is installed in a store that implements the product sales / purchase management system of the present invention, and is connected to the management server 1 via the Internet, a dedicated line, or a public line 4, and these stores. The terminal 3 includes an input device 3A such as a barcode scanner or a keyboard and an output device 3B such as a printer.

  The control processing unit 16 controls and manages the communication control unit 11, customer database 12, product database 13, sales / purchase database 14, and unpurchased product database 15.

  First, when a customer purchases a product using a store that implements the system of the present invention or an online store on the Web, the customer needs to be registered in the customer database 12.

  FIG. 2 is an explanatory diagram of data items in a table stored in the customer database 12. The customer table 121 includes customer information such as a customer code 1211, a name 1212, an address 1213, a telephone number 1214, a mail address 1215, and a password 1216. These are registration information for executing the merchandise sales / purchase management system of the present invention, and other tables may be added as necessary.

  The customer code 1211 is a customer management code set in this management system, and the password 1216 is a combination of numbers and symbols arbitrarily set by the customer.

  FIG. 3 is an explanatory diagram of data items in a table stored in the product database 13. The product database 13 includes a product table 131, a product purchase guarantee amount table 132, and a market price purchase table 133.

  The product table 131 includes basic information on products, and includes at least a product code 1311, a product name 1312, a sales price 1313, and a product summary description 1314.

  The merchandise purchase guarantee amount table 132 includes a merchandise code 1321, a purchase guarantee amount 1322, and a purchase guarantee amount application period 1323.

The purchase guarantee amount 1322 is presented to the customer before the sale of the product and at the time of sale. If the customer wishes to sell the product after purchasing the product, the purchase guarantee amount 1322 is guaranteed as a reference amount for the purchase price of the product. . Actually, an adjustment may be made such as determining a purchase price taking into consideration the damage situation or the like from this price.

  The purchase guarantee amount 1322 is set such that a plurality of data can be set according to the period from the product sale date to purchase and various conditions. Further, the purchase guarantee amount 1322 can be changed at any time according to the sales situation or the purchase situation. When the guaranteed purchase price 1322 is changed, a new record is added and created.

  With the process of newly creating this record, once the sale date is known for all products that have been sold with a purchase guarantee amount in the past, the purchase guarantee presented in the purchase guarantee amount application period 1323 corresponding to the sale date. The amount can be extracted by the execution process of the server 1.

  The market price purchase amount table 133 has a product code 1331 and a market price purchase amount 1332. The market price purchase price is a so-called market price (market price) of purchase, which is determined by a balance between supply and demand of second-hand goods, and is changed as needed according to market conditions.

  Although the configuration of the product database 13 is divided into three tables in this description, it is set so that the same management can be performed regardless of whether it is executed with a single table or multiple tables. It only has to be.

  The same product code is set for each product. If the product is the same product code 1311, 1321, 1331 in each table, 1413, 1423 in FIG. 4 to be described later, and 1512 in FIG. 5 are the same product code. To manage. Similarly, customer codes 1211, 1412 and 1422 in FIG. 4, and 1511 in FIG. 5 are managed by the same code for the same customer.

  FIG. 4 is an explanatory diagram of data items in a table stored in the sales / purchase database 14, and is composed of a sales table 141 and a purchase table 142.

  When a customer purchases a product, the management server 1 records the sales information in the sales table 141. The sales table 141 has at least a sales date 1411, a customer code 1412, a product code 1413, and a sales price 1414. Specifically, the sales table 141 stores the sales contents for each transaction. That is, sales of one product are recorded as one record.

  The purchase table 142 has at least a purchase date 1421, a customer code 1422, a product code 1423, and a purchase price 1424. Specifically, at the time of product purchase by the purchase method described later, the purchase of one product is recorded as one record according to the contents of the purchase table 142.

  FIG. 6 is a flowchart for explaining the flow of processing when selling products. First, a customer selects a product regardless of an actual store or an online store on the Web (step 1). A major feature of the implementation of the system of the present invention is that the customer receives a purchase guarantee amount before purchase.

  The management server 1 extracts information on the guaranteed purchase price 1322 recorded in the guaranteed purchase price table 131 of the product database 13 (see FIG. 3) and presents it to the customer (step 2).

  FIG. 7 is an explanatory diagram of an example of a purchase guarantee amount presentation to a customer. The management server 1 extracts and describes the product name and summary description in 71 from the product database 13 (see FIG. 3) and the product table 131 summary description 1314 of the product.

In addition, information on the sale price and purchase guarantee amount of the product is extracted from the product purchase database 13 (see FIG. 3) and the purchase guarantee amount 1322, and is displayed in 72, and general points to be noted in the sale and purchase are displayed. .

  The product information extracted and provided by the server 1 is a web page provided to a customer terminal connected from the Internet, on-page advertisements such as POPs, in-store advertisements, store information terminals screens, etc. Etc. to notify customers. As described in the effect of the invention based on this information, the customer makes a purchase plan in consideration of the sale price after use, which has not been provided by the purchase of the product so far, together with the content and price of the product. The purchase can be decided.

  In addition, in the presentation image of FIG. 7, the purchase guarantee amount is presented for each period until purchase, but the presence / absence of the setting for each period, the length of the period, and the guarantee rate of the purchase guarantee amount depend on the characteristics of the products handled and the market It is possible to set freely according to the situation.

  Returning to the flowchart of FIG. Upon receiving information on the guaranteed purchase price of the product in step 2 and determining the purchase of the product (step 3), the management server 1 confirms the presence or absence of customer registration (step 4). A customer who is not registered in the customer database 12 (see FIG. 2) performs customer registration and registers it in the customer database (step 5).

  After registering customer information according to the contents of the customer table 121 (see FIG. 2), when the sale of the product is established, the sales information is recorded in the sales table 141 of the sales / purchase database 14 (see FIG. 4) (step 6).

Next, the configuration of the unpurchased product database will be described with reference to FIG. 5, and the creation flow will be described with reference to FIG.

FIG. 5 is an explanatory diagram of data items in a table stored in the unpurchased product database 15.

  The unpurchased product table includes at least a customer code 1511, a product code 1512, a product name 1513, a sale date 1514, a sale price 1515, a purchase guarantee amount 1516 presented on the sale date, a purchase guarantee amount 1517 on a designated date, a market price purchase amount 1518, With the highest purchase amount 1519.

  FIG. 8 is an explanatory diagram showing an execution flow of unpurchased product database creation processing. When the sale is established, the management server 1 records the data recorded in the sales / purchase database 14 (see FIG. 4) sales table 141 in the unpurchased product database 15 (see FIG. 5) unpurchased product table 151.

  First, the management server 1 stores the customer code 1412, product code 1413, sales date 1411, and sales price 1414 data in the sales / purchase database 14 (see FIG. 4) sales table 141 in the unpurchased product database 15 (see FIG. 5). The customer code 1511, product code 1512, sales date 1514, and sales price 1515 (step 1) of the unpurchased product table 151 are recorded.

  Next, the management server 1 acquires the product name 1312 corresponding to the product code from the product database 13 (see FIG. 3) product table 131 and records it in the unpurchased product database 15 (see FIG. 5) product name 1513 (step 2). .

  Next, the management server 1 acquires the purchase guarantee amount 1322 corresponding to the product code and the sales date from the product purchase guarantee table 132 of the product database 13 (see FIG. 3), and stores the purchase guarantee amount 1322 in the unpurchased product database 15 (see FIG. 5). The purchase guarantee amount 1516 presented on the sales date is recorded (step 3).

  In addition, when the purchase guarantee amount 1516 presented at the time of the sale is presented with a plurality of purchase guarantee amounts depending on the period from the sale date to the purchase date, the management server 1 refers to the date of inquiry from the customer or designated by the customer. A purchase guarantee amount applied on an arbitrary designated date is calculated, and a purchase guarantee amount 1517 (see FIG. 5) on the designated date is calculated (step 4).

  Next, the management server 1 acquires the market price purchase amount 1332 from the market price purchase table 133 of the product database 13 (see FIG. 3) and records it in the market price purchase amount 1518 of the unpurchased product database 15 (see FIG. 5) (step 5).

  Next, the management server 1 selects the higher price from the guaranteed purchase price 1517 and the current price purchase price 1518 on the specified date of the unpurchased product database 15 (see FIG. 5), and sets it as the highest purchase price 1519 (see FIG. 5). Record (step 6).

  In addition, when a product to be described later is purchased, the management server 1 deletes an unpurchased product whose information matches from the customer code and the product code from the unpurchased product database 15.

Next, a product purchase operation will be described. FIG. 9 is an explanatory diagram showing an execution flow of the process of purchasing a product. A case where a product desired to be purchased from a customer is brought into a store and a case where an information inquiry regarding purchase of a product is made will be described.

  First, the management server 1 confirms the presence / absence of customer registration from the customer database 12 (see FIG. 2) (step 1). As shown in the previous section, if the product is sold with the purchase guarantee amount presented in this system, all customers are registered. If there is no customer registration, all products will be purchased at the current price. 3), the market price purchase amount 1332 of the market price purchase table 133 is adopted as the purchase standard amount (step 5).

  If there is a customer registration, the management server 1 refers to the unpurchased product database 15 (see FIG. 5) and determines whether it is an unpurchased product or other product from the customer code and the product code of the brought-in product. (Step 2).

  In the case of an unpurchased product, the management server 1 refers to the unpurchased product database 15 (see FIG. 5) (step 3), adopts the highest purchase amount 1519 (step 4), and sets the purchase reference amount (step). 6).

  Returning to step 2, if the product is a product other than an unpurchased product, the product purchase is based on the market price, and the market price purchase amount 1332 in the market price purchase table 133 is extracted (see step 5) (step 5). ) Use the purchase amount as a reference amount (step 6).

  The purchase standard price here is the standard price that assesses the degree of deterioration and damage of the product from this amount and sets it as the actual purchase price. Alternatively, the purchase standard amount may be the actual purchase amount.

  The customer decides whether to sell in accordance with the purchase standard amount or the actual purchase amount after the assessment (step 7).

  When the purchase is established, the management server 1 records the sales / purchase database 14 (see FIG. 4) in the purchase table 142. In the case of an unpurchased product, the management server 1 finds the customer from the unpurchased product database 15 (see FIG. 5). The corresponding merchandise owned is deleted (step 8).

  In this embodiment, the management server 1 creates, updates, and deletes all information about the unpurchased product database 15 (see FIG. 5) every time a product is sold or purchased. It may be configured to create and update in units of customer codes when inquiring from.

  Further, the creation and management of the unpurchased product database may be configured so that the same effect can be achieved regardless of the details of the database creation of this processing and the procedure of the flow processing.

  One of the great effects of implementing the product sales and purchase management system of the present invention is that the customer can easily know the sale price of the product after purchasing the product. FIG. 10 is an explanatory diagram showing an execution flow of a process of providing a list of unpurchased products to a customer terminal. Hereinafter, the flow of processing will be described using this flowchart.

  When the connection from the customer terminal is accepted through the Web (Step 1), the communication control unit 11 of the management server 1 (see FIG. 1) displays the Web page (Step 2).

  FIG. 11 is an explanatory view showing a screen example of the Web page main menu. The Web page includes a product information menu 1101, an unpurchased product list request 1102, and a logout key 1103. When a specific product is selected by pressing the product information 1101, product information including information on the guaranteed purchase price (FIG. 7). When a request for unpurchased product list 1102 is pressed (step 3), the management server 1 displays an unpurchased product list login screen.

  FIG. 12 is an explanatory diagram showing an example of an unpurchased product list login screen on the Web page. When a number or symbol registered at the time of customer registration is entered in the customer code input field 1201 and password input field 1202 and the login 1203 is pressed (step 4), the management server 1 (see FIG. 1) holds the customer database 12 (see FIG. 2), it is confirmed whether the contents of the customer code 1211 and the password 1216 match (step 5). If they match, a list of unpurchased products is displayed (step 6).

  The management server 1 extracts the corresponding data of the customer code that accepted the request from the unpurchased product database 15 (see FIG. 5) that it holds, creates a list of unpurchased products, and displays it on the Web page.

  FIG. 13 is an explanatory view showing a screen example of a list of unpurchased products displayed on the customer terminal. In 1340, the customer name corresponding to the customer code is entered, and the unpurchased product list is displayed in 1360.

  The management server 1 has a product name 1361, a sale date 1362, a sale price 1363, a purchase guarantee amount 1364 presented at the time of sale, a purchase guarantee amount 1365 on a specified date, a current purchase price 1366, the highest purchase price in the unpurchased product list 1360. The guarantee amount 1367 is the product name 1513 of the unpurchased product database 15 (see FIG. 5), the sale date 1514, the sale price 1515, the purchase guarantee amount 1516 presented on the sale date, the purchase guarantee amount 1517 on the designated date, the market price purchase amount 1518, Each is extracted from the highest purchase guarantee amount 1519 and displayed.

  The management server 1 normally displays the inquiry date on the specified purchase date 1350, and extracts and displays the purchase guarantee amount 1365 on the specified date based on the specified date. Re-creates a list of unpurchased products based on the specified date entered and displays it on the customer terminal.

  Words such as annotations, precautions, and guidance about the unpurchased product list are displayed on 1370, and the total of the highest purchase price 1367 is calculated and displayed on 1371.

  Pressing logout 1380 returns to the menu page (see FIG. 11).

  When a customer requests a list of unpurchased products at a store, a similar inquiry is made from the store terminal and presented to the customer on the screen of the store terminal or printed material.

  Although the present invention has been illustrated and described in detail above, the present invention can be applied to the sale of various products such as books, automobiles, and houses, and is also actually related to stores that perform sales / purchase operations. It can be applied to any store or online store on the Web. The embodiments can be changed or improved in various configurations and details without departing from the scope of the present invention.

It is a functional block diagram of the sales and purchase management system in the embodiment according to the present invention. It is explanatory drawing of the data item of the table stored in the customer database in embodiment concerning this invention. It is explanatory drawing of the data item of the table stored in the goods database in embodiment concerning this invention. It is explanatory drawing of the data item of the table stored in the sales and purchase database in embodiment concerning this invention. It is explanatory drawing of the data item of the table stored in the unpurchased goods database in embodiment concerning this invention. It is explanatory drawing which shows the implementation flow about the goods sales in embodiment concerning this invention. It is explanatory drawing which shows the example of purchase guarantee amount presentation in embodiment concerning this invention. It is explanatory drawing which shows the implementation flow of the unpurchased goods database creation process in embodiment concerning this invention. It is explanatory drawing which shows the execution flow of the process of the goods purchase business in embodiment concerning this invention. It is explanatory drawing which shows the implementation flow of the process which provides the customer terminal with the list of unpurchased goods in embodiment concerning this invention. It is explanatory drawing which shows the example of a screen of the main menu displayed on a customer terminal. It is explanatory drawing which shows the example of the unpurchased goods list login screen displayed on a customer terminal. It is explanatory drawing which shows the example of a screen of the unpurchased goods list displayed on a customer terminal.

Explanation of symbols

1 management server system 2 customer terminal 3 store terminal
4 Internet or leased line or public line 11 Communication control unit 12 Customer database 13 Product database 14 Sales / purchase database 15 Unpurchased product database 16 Control processing unit 121 Customer table 131 Product table 132 Product purchase table 133 Market value purchase table 141 Sales table 142 Purchase guarantee amount table 151 Unpurchased product table S1 to S8 Represents Step 1 to Step 8

Claims (5)

  In a computer server that manages the sale and purchase of products that can be connected to a customer terminal or store terminal, the computer server is a product database that manages at least the product, and a sales / purchase database that manages the sale and purchase results of the product. And a customer database for managing customers, and the product database further includes information on the guaranteed purchase price of the product after sale.   2. The merchandise sales / purchase management system according to claim 1, wherein the computer server comprises means for extracting a merchandise purchase guarantee amount at the time of merchandise sale or before merchandise sale and means for presenting to the customer, and the merchandise sale is established. Then, it is provided with means for recording the sales performance, and after the sale of the product, it has a means for managing information including the guaranteed purchase amount presented at the time of sale for the product throughout the period until the product is purchased. Product sales and management system.   In the merchandise sales / purchase management system according to claim 1 and claim 2, the computer server, the merchandise database further includes information on a purchase price based on a current price of the merchandise (a market price of the merchandise at that time). A means for extracting a purchase price based on the market price (hereinafter referred to as a market price purchase price) together with the product purchase guarantee price according to claim 1 and claim 2; A product sales / purchase management system comprising means for selecting a higher price and presenting it to a customer.   4. The product sales / purchase management system according to claim 1, 2 and 3, wherein the computer server is a product sold to a customer by an inquiry from a customer terminal or a store terminal, and is still purchased. Means for extracting products that have not been purchased (hereinafter referred to as unpurchased products), means for extracting purchase guarantee amount information and market price purchase amount information for the extracted unpurchased products, and related to the extracted unpurchased products A product sales / purchase management system comprising means for providing information to a customer. In the merchandise sales / purchase management system according to claim 1, claim 2 and claim 3, the computer server (b) claims about the brought-in merchandise when purchasing the merchandise from the customer. (B) In the case of a product sold with a purchase guarantee amount, the purchase guarantee amount presented at the time of sale, and an inquiry Means for extracting the purchase guarantee amount applied at the time, (c) means for extracting the market price purchase amount as claimed in claim 3 for all products, (d) in the case of (b) above, the extracted purchase guarantee amount and extraction And a means for selecting and presenting the higher price of the current market price purchase amount.

Images