1. A sales system for coupling to a communications network, the sales system including: a first sales interface at a first network address, the first sales interface including a first set of categorized interface elements; a second sales interface at a second network address, the second sales interface including a second set of categorized interface elements; and a sales server at a third network address that operates the first and second sales interfaces to provide an impression that the first and second sales interfaces are being operated by different entities, wherein the sales server includes a categorization interface that is responsive to user input to define the first and second sets of categorized interface elements, and wherein the categorized interface elements each include a plurality of specification elements.