Information is power. For years, real estate agents and their lobbying groups have done their best to block public access to the Multiple Listing Service (MLS). The MLS is a collection of information about virtually all the "listed" homes for sale in a given area, (usually to the exclusion of FSBO's). Home buyers have had to work with real estate agents in order to gain access to information on the MLS. To this day, real estate agents attempt to maintain strict control of the MLS.