Advertising services, namely promoting properties for sale by owner via the Internet; Providing a web site that enables users to post items for sale through on-line classified advertisements; Providing a web site where users can post ratings, reviews and recommendations on products and services; Providing a web site which features advertisements for the goods and services of others on a global computer network; Providing advertising, marketing and promotional services, namely development of advertising campaigns for large-scale web and interactive television products; Providing an on-line searchable database featuring used book being offered for sale and buyer/seller contact information; Providing listings of businesses for sale; Providing space at a web site for the advertisement of the goods and services of others; Publicity and sales promotion services