OK, going to play devils advocate.
Sometimes you have to look at both sides, too. Every buyer in the world is willing to talk something down, but when the seller decides to take a better offer, he gets criticized and called names.
Seems like too low an amount to be screwing with you, unless he only wanted $500 for the car in the first place. How do you know for sure that someone didnt offer him more unless you were with him the entire time between when you made the deal, and when you went to pick the car up? Did you talk him down on the car, or offer to pay him what he originally wanted? I bet the car will be gone if you go back.
Not saying that what this guy did was right, but if the car was what I wanted, I would have paid the extra $300 and brought it home.
Who knows how long you'll wait until you find another one.
