Real Estate Services, conducting a multi-family real estate exchange; multifamily listing and information; Providing investment information in the nature of an apartment exchange index, via electronic means; Multi-family real estate acquisition, including real estate brokerage services, operating market places for sellers of multi-family real estate; Financial investment in the field of multi-family real estate, providing multi-family real estate brokerage, listing, exchange placement and sales information related to owners, brokers, lenders, management and other multi-family real estate market participants; A global multi-family computer information network for all aspects of multi-family sales, investment, listing, brokerage services, financing, management and all other services relating to the sales/exchange and operation of multifamily property