On-line trading services, namely, providing a web site where parties post products or services for trade or sale and transactions are done via the Internet, and where users can offer goods or services for trade or sale and buy or trade goods or services offered by others via a computer network; providing customer support services in the field of online customer account management and catalog ordering services featuring collectibles; providing a web site promoting the goods of others for the purpose of on-line buying, selling and trading; electronic on-line catalog services featuring collectibles; carrying out tasks necessary for the smooth conduct of on-line transactions, namely providing inventory management in the field of collectibles, providing customized consumer product information for products on consumers wish lists, historical pricing and current fair market value pricing; and on-line inventory management services in the field of collectibles