Patent ID: 7917404

Claim:
A commodity sales system comprising: a database storing, in a supply list, information about a plurality of supply quantities and a supply price that, for each supply quantity, indicates a supply cost obtained from at least one commodity supplier for the particular commodity item; a seller server configured to perform the operations of receive purchase wish information from intending purchasers through a network for a predetermined period of time, the store the purchase wish information in the database, retrieve, from the database, the purchase wish information, the purchase wish information includes a desired purchase price and a desired purchase quantity for the particular commodity item, produce a purchase wish list having the information arranged in a predetermined order after the predetermined period of time, select an optimum combination of intending purchasers, selling quantities, selling prices, commodity suppliers, supply quantities, and supply prices by comparing only the desired purchase price and the desired purchase quantity from the purchase wish list with the supply price and the supply quantity from the supply list, and transmit a purchase admission notification to the selected intending purchasers, wherein the supply price lowers as the supply quantity increases, and each supply quantity is classified into a supply quantity range indicating a maximum supply quantity range for each commodity supplier.