Because many of the leading online real estate sites have opted to source listings directly from brokers, rather than becoming brokers themselves and displaying listings via IDX, there are many gaps in the inventory they display. Consumers are either unaware of this issue, and make life-changing decisions with incomplete information, or throw down their stone and start hopping. – 1000Watt Blog – Online Real Estate’s Dirty Little Secret – Aug. 11th, 2008