It minded computer network, the commodity of contentious other companies and/or online price relative manner of service and the commodity which

摘要

(57) Abstract Through the computer network of Internet and the like, the commodity which the trader sells and/or method for the computer mounted type online price comparative law which does the price comparison and reduction of service and the device are offered. As for price comparative law the customer can select, the result computer program through computer network, transmitting price request, claims the price of competitive other companies. When price of competitive other companies is received, that price is indicated in the customer. The computer program compares the price and commodity price of competitive other companies concerning the designated commodity. When price of competitive other companies is high, it does not process. But, when price of competitive other companies is low, the computer offers the reduction required option of price to the customer. When the customer requires reduction, it judges the computer program whether or not price of competitive other companies is lower than specified threshold value. When it is low, the computer program recommends that in the customer the designated commodity is purchased from competitive other companies. On the one hand, when price of competitive other companies it is not lower than threshold value, reducing the commodity price of the trader, it indicates in the customer, the customer competitive other companies compared to low at price can purchase the product.