Who knew? 1. Zillow is the largest website in the world for Real Estate . 2. They were major innovators in a # of areas and took over #1 position from Realtor .com. 3. They offer For Sale By Owners free listing which the whole world can see. 4. But, they have 3 Agents who pay for leads near the photo of the listing and the Agents take turns taking inquiries about your house that won't go to you. Sometimes free, has a catch. What you can do about it.? Make sure you have your phone # where it says owner and some people may scroll down and see it and call. By the way Zillow bought Trulia last year and so now they are partners. As Paul Harvey used to say, Now you know the rest of the story.