A method and system for brokering real estate transactions, in which a broker allows a user to sell a first property and purchase a second property via a computer communications network. The method and system include the following steps : (a) the broker accepting at least one first property sale offering; (b) the broker providing at least one second property purchase offering; (c) the broker allowing the user to accept a selection of at least one second property selected from the at least one second property purchase offering; (d) the broker transferring the sale proceeds from the sale transaction of the first property to the user, for use in purchasing the at least one second property selected in said accepting step (c); and (e) executing a purchase transaction of the at least one second property selected in said accepting step (c), using the sale proceeds from the sale transaction of the at least one first property as payment towards the purchase of the at least one second property.