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; Membership club services providing discounts to members on real estate commissions and mortgage fees; Promoting the goods of others by means of on-line real time presentation for inspection, viewing or showing of waterfront real estate; Providing a database featuring real property tax information; Providing real estate leads for prospective purchasers; Real estate advertising services; Real estate marketing services in the field of waterfront real estate; 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