1. A method to provide a customized combination package best offer, the method comprising: receiving, from a potential buyer, a selection of a plurality of items offered for sale by a single seller, the selection of the plurality of items creating a customized combination package; determining, using one or more processors, whether the potential buyer is a qualified buyer; and based on a determination that the potential buyer is qualified, providing an available price history for the customized combination package to the qualified buyer; receiving a best offer for the customized combination package from the qualified buyer; and providing the best offer to the seller selling the plurality of items for acceptance or rejection.