The present invention is a method of selling replacement parts for a product over a computer network including providing a plurality of product manufacturer selection options for a customer to select from, receiving a manufacturer selection of one of the product manufacturers, providing a plurality of product selections for the customer to select from, receiving a product selection of one of the products, providing a schematic illustrating a plurality of component parts of the product with associated reference identifiers, receiving a selection of at least one of the component parts, providing a description of the component part selected, including at least one name for the component part and at least one part number for the component part.