Advertising services, namely, promoting properties for sale by owner via the Internet; Arranging and conduction of auction sales; Business management assistance and particularly carrying out tasks necessary for the smooth conduct of sales by auction; Providing a web site that enables users to post items for sale through on-line classified advertisements; Providing information about automobiles for sale by means of the Internet; Providing used car sales leads for others; Sales promotion for third parties; Sales promotion services; The bringing together, for the benefit of others, of a variety of goods and services, enabling customers to conveniently view and purchase those goods and services from an Internet website particularly specializing in the marketing of the sale of goods and services of others