Online trading services; namely, operating online marketplaces for sellers and buyers of goods and services; online trading services in which sellers post products or services to be offered for sale; and purchasing is done via the Internet in order to facilitate the sale of goods and services by others via a computer network; providing evaluative feedback and ratings of sellers' goods and services, the value and prices of sellers' goods and services, buyers' and sellers' performance, delivery, and overall trading experience in connection therewith; providing a searchable online advertising guide featuring the goods and services of online vendors; providing a searchable online evaluation database for buyers and sellers; advertising and advertisement services