Customer relationship management conducted via global computer networks; Cooperative advertising and marketing service by way of solicitation for third parties via global computer networks; Providing a web site whereby buyers of goods and services locate and receive quotations from multiple competitive sources and sellers of goods and services bid on multiple new sales opportunities; Providing information about the goods and services of others via a global computer network; Exchange services, namely, bartering of goods for others via global computer networks; Negotiation and settlement of commercial transactions for third parties via global computer networks