A Dynamic property buying and selling system is described. The system is comprised of networked hardware, software, processes and methods that enable an auction like system to inform buyers, sellers and interested third parties of current market information and dynamics. The described system may be used in real estate and other markets to complete early stages of a negotiation process as well as enable buyers and sellers to test for market information. Third party observers may use the system to investigate and report on market information and test economic theories regarding the market of interest. An integrated expert system is useful to buyers, sellers and third party observers in providing answers to queries regarding correlation of auction parameters and optimization of parameters for particular desired outcomes. Controls are integrated into the system to help ensure reliability and accuracy of the results and information by blocking observed detrimental activity.