METHOD AND SYSTEM FOR SHARING INFORMATION FOR ON-LINE FREE MARKET, SELLING AND BUYING INFORMATION SHARING DEVICE, OPPOSITE PARTY INTRODUCING DEVICE, AND STORAGE MEDIUM STORED WITH SHARING PROGRAM FOR INFORMATION FOR ON-LINE FREE MARKET

摘要

PROBLEM TO BE SOLVED: To help a seller and a buyer meet each other when meeting in their conditions by gathering selling and buying information without greatly modifying the application of the current on-line free market. SOLUTION: Selling and buying information sharing devices distributed in a network convert a selling or buying request inputted by a seller or a buyer to a format which can be recognized by a opposite-party introducing device for introducing an opposite party to the seller or buyer and store the request, and the opposite-party introducing device searches a selling and buying information sharing device for the format-converted selling or buying request, detects a seller and a buyer who in meet conditions of the selling or buying request by matching, and introduces the buyer to the seller or the seller to the buyer.