Advertising services; Auctioneering; Demonstration of goods; Direct mail advertising services; Import-export agency services; Marketing services; On-line advertising on a computer network; Preparation and realization of media and advertising plans and concepts; Price comparison services; Providing business information via a web site; Provision of an on-line marketplace for buyers and sellers of goods and services; Purchasing and procurement services, namely, procuring of contracts for others for the purchase of goods and labor contracting services; Sales promotion for others