Advertising, including promotion relating to the sale of articles and services for third parties by the transmission of advertising material and the dissemination of advertising messages on computer networks; Business management consulting with relation to strategy, marketing, production, personnel and retail sale matters; Independent sales representatives in the field of duramax diesel trucks; Marketing services, namely providing informational web pages designed to generate sales traffic via hyperlinks to other web sites; Providing a web site that enables users to post items for sale through on-line classified advertisements; Providing a web site whereby buyers of goods or services locate and receive quotations from multiple competitive sources and sellers of goods or services identify and bid on multiple new sales opportunities; Providing an on-line searchable database featuring used book being offered for sale and buyer/seller contact information; Providing information about automobiles for sale by means of the Internet; Providing used car sales leads for others; Publicity and sales promotion services; Sales demonstration