Abstract: A buyer-seller matching system that uses incentives to verify commissions from matching the buyer with a seller. An item locator system that comprises a repository of information about items for purchase may be provided over a network for users to access information about items for purchase. Along with each item, the system presents an incentive that may be realized if that item is purchased from a designated third party seller. The user then executes the purchase with the seller, who pays the system the agreed upon fee and also issues a certification of purchase to the buyer. The user may then take the certification of purchase back to the central repository to redeem the incentive. The item locator system then checks to verify that it has received a fee or commission from the seller for bringing the seller a buyer of the item. The fee or commission may be based on the price of the item, such as if the item is a new house for sale and the seller is a new house builder.