Last year, I responded to a house for sale posted by a Best Buy Homes agent, made an appointment to meet at his office and went out to see the house. All was going fine until he talked me into looking at a house that was different from the one I was expecting to see. During the car ride to the other house, I asked him more than 3x, "what about the house I am interesed in,?" but he continued to dodge the inquiry and give a hard sell for "the better home." I looked at the house he was obviously interested in selling and wasn't impressed. It was more than I was willing to spend and not in the neighborhood I wanted--unlike the house I was calling about. Long story short, he never showed me the house posted even after I asked about it AGAIN after we returned to the office. He stopped returning my phone calls.
I wound up buying a house a couple months later. About less than 2 months in my new home, I received a real estate alert that I had set up here on Trulia during my house hunting days. To my surprise, I saw a Best Buy Homes posting of a really nice looking house for sale in my new neighborhood with a very enticing low purchase price....It was actually a picture of the house I just bought!! I called the phone # and the agent gave me the same friendly sales pitch that cleverly evaded my inquiry about the house in the posting. I finally cut him off, told him the posting was a crock of s*** because it was a picture of MY house and ordered him to take it down. He hung up on me. The posting suddenly disappeared.
So there you have it. My opinion is, based on my experience with them, the houses they post don't actually exist. They are bait to get you in to look at other houses they're trying to flip.
And a note ot the agent who responded "...if you don't trust the site why are you using it." It's not the site that's untrustworthy, it's the real estate professionals (not all) who are unscrupulous and use bait and switch tactics to sell their homes. Best Buy Homes is one of them.