Others here have posted great answers to this question. I'd like to add that this is a good reason to consult a REALTORÂ®. In my market, any website that claims to show you ALL of the listings is lying through their teeth. This is because if the person who does the listing entry does not check the correct box, the listing is not visible to anyone other than a REALTORÂ® member of the MLS. This might happen via ignorance or an oversight, or it might be because the seller says "I don't want my house to be seen on the internet". That may sound like a crazy thing for a seller to say, but I've heard crazier.