1. A method of determining market demand information for buying and selling properties comprising: a. inputting external market factor information, b. inputting property data for a plurality of properties, c. inputting selling parameters, d. inputting buying parameters, e. receiving offers on said properties based upon said selling parameters and said buying parameters, and, f. determining market demand information from the received offers, said market demand information including future buying and selling parameters from multi-variate analysis having input variables and outcomes wherein the input variables are the inputted external market factor information, inputted selling parameters and inputted buying parameters and the outcomes include a high offer, a low offer, number of offers, frequency of offers and average time to a deal, g. providing the determined market demand information to a user h. wherein the steps of the method are performed by a networked computer system.