Advisory services for preparing and carrying out commercial transactions; Auction management services provided to others over an on-line web site accessed through a global computer network; On-line auctioneering services via the Internet; On-line consignment services whereby goods are received on consignment for auction on an online auction site; On-line trading services in which seller posts products to be auctioned and bidding is done via the Internet; On-line trading services in which users post requests for products and negotiate transactions via the Internet; Operation and supervision of business facilities for secure, in-person business transactions between buyers and sellers of goods and/or services; Providing a website featuring on-line classified advertisements; Providing a website for connecting sellers with buyers; Providing on-line auction services