Matching consumers with real estate professionals in the field of real estate services via computer network; Matching potential buyers to facilitate co-ownership of residential real property; Negotiation and renegotiation for others of leases and subleases and real estate purchase agreements; Providing a database featuring real property tax information; Providing an interactive real estate website which promotes housing and apartment properties through offering prospective tenants video walk throughs, property descriptions, text, price, location, maps and other information that would be influential to a prospective tenant in making a rental decision; Providing interactive sales assessment services via the telephone for measuring the skills and knowledge of field sales forces in real world selling situations; Providing marketing services for REAL ESTATE; Real estate advertising services; Real estate marketing analysis; Real estate marketing services in the field of INTERNET MARKETING; Real estate marketing services, namely, on-line services featuring the promotion of residential new construction, which also contains back office solutions for builders; Real estate marketing services, namely, on-line services featuring tours of residential and commercial real estate; Real estate sales management