A first entity maintains an advanced sales system on a server accessible over a global communications network. The first entity provides access to the server to a second entity which is a sales oriented business. The server houses at least a database, a product selection module, and a proposal generator. The database contains information on products for sale, information about the sales oriented business, and information about customers of the sales oriented business. The product selection module facilitates selection and accessorizing of products by the second entity. The proposal generator creates proposals based on input to the product selection module and information in the database. The advanced sales system provides structure to extremely large product offerings with large numbers of accessories associated with the product offerings. Some embodiments of the advanced sales system provide additional ordering support.