Several things are wrong with that ad.
1. They promote it as a "private party sale" and then call themselves "Autotwins".
2. They say "Autotwins - We are one of the world's largest vehicle brokers and take pride in our inventory."
3. "First and foremost, this is a private party sale and you will not pay any sale's tax in many states. This alone could save you thousands of dollars over a dealer owned vehicle." <---that's also illegal in many states...