Providing price quotations for new and used goods or services; providing a web page on a global computer network for infomediary services, namely, facilitating transactions between buyers and sellers through providing buyers with information about sellers, new and used goods, and/or services, operating on-line marketplaces for sellers of new or used goods and/or services, providing a web site at which users can offer new or used goods for sale and buy new or used goods offered by others and providing information as to the availability of the new and used goods of others for rent or purchase