Patent ID: 8352330

Claim:
A method for providing electronic commerce through an estimate request and response, the method comprising: receiving, via a communication interface of an on-line market server, an estimate request from a buyer terminal selecting at least one of a plurality of option items from estimate request information registered on the on-line market server and associated with a seller terminal; in response to receiving the estimate request, the on-line market server deducts cash points from an account of a user of the buyer terminal, the account being controlled by the on-line market server; receiving an estimate response from the seller terminal in response to the estimate request from the buyer terminal; providing, via the communication interface of the on-line market server, at least one estimate to the buyer terminal according to the estimate response from the seller terminal; and receiving a purchase request from the buyer terminal in response to the estimate and performing a corresponding process; in response to receiving the purchase request from the buyer terminal, the on-line market server returns the cash points to the account of the user.