Advertising, including on-line advertising on a computer network; Demonstration of goods; On-line advertising on computer networks; Pay per click advertising; Import-export agency services; Promoting the goods and services of others by providing a community-driven web site featuring user-submitted content in the nature of coupons, rebates, price-comparison information, product reviews, links to the retail web sites of others, and discount information; Providing advertising, marketing and promotional services, namely, development of advertising campaigns provided through cable television broadcast, web casts, radio broadcasts, newspapers, magazines, online banners, outdoor billboards, wild postings, bus and subway ads; Providing a searchable on-line advertising website and guide featuring the goods and services of other vendors via the Internet; Provision of an on-line marketplace for buyers and sellers of goods and services; Provision of information and advice to consumers regarding the selection of products and items to be purchased