| 摘要 |
PURPOSE: A method and system for substituting purchase is provided to reduce logistics cost and circulation margin by using high speed Internet and substituting a joint purchase of consumers purchasing same product in a cyber-space. CONSTITUTION: A trading computer(100) inquires of a seller computer(300) about selling item, and when selling item information is notified from the seller computer(300), stores the notified selling item information to a data storage unit. When purchase demand is inputted from buyers, the trading computer(100) provides the selling item information to buyer computer(200), receives purchasing item from the buyer computer(200), and notifies the seller computer(300) with the purchasing item. The seller inquires the buyers of payment method. When the buyers deposit money according to the selected payment method, the seller delivers the items to the corresponding buyers.
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