A method and system are provided that enable partner sites to join in the sale of products/services via a PowerBuy business method. A seller registers a list of products/services to be displayed on partner sites. Customers/visitors who access partner sites may link to one or more PowerBuys conducted on an owner's main site. Accordingly, the method and system enable a super demand aggregation for products/services offered for sale by the PowerBuy business method. The invention provides a partner menu tree that allows partners to pre-select products/categories for display to customers linking to the PowerBuy from their partner site. Sellers may provide particular products, services, categories, and abstract terms to help partners select which products/services to display for customers from among all the PowerBuy products/services. The invention has applicability to sales paradigms other than the PowerBuy business method.