Provision of an on-line marketplace for buyers and sellers of real estate; Providing an online market place for matching real estate buyers and real estate sellers; Providing an online market place for facilitating real estate deals between real estate buyers and real estate sellers; Matching real estate buyers and real estate sellers via a computer network; Facilitating deals between real estate buyers and sellers via a computer network; Providing an online market place where real estate sellers can list real estate for sale for viewing by real estate buyers; Providing an online market place where real estate buyers can provide a description of real estate they wish to purchase for viewing by real estate sellers; Providing an online market place for matching real estate buyers and real estate sellers with third party real estate service providers providing real estate financing, real estate appraisals, real estate insurance, title insurance, real estate legal services, real estate accounting, 1031 exchange services, real estate inspections, and real estate construction services; Providing services for supporting a real estate transaction