A computer aided system and method run by a transaction service firm enrolls participating real estate agents in its database. The participating agents which are accepted for enrollment agree to rebate a certain portion of their listing or selling commission to the seller or buyer, respectively. The firm advertises its discount services to the public, and a potential seller or buyer may register for a fee with the firm. Once registered, the seller or buyer is matched with a participating agent who may accept a listing or sale, which is handled in the normal manner within the brokerage firm for which the agent works. At closing, or other agreed time, the listing and/or selling agent would then rebate a portion of his commission to the client.