Yeah, you can pull your pants back up and then buy some Preparation H for your plundered assmeats. You can also file a case in small claims court, but you would have to go back to his area and file there most likely, since that is where the sale physically occurred. He did state in the item description that the A/C worked and obviously it does not. That is a material misstatement of fact and should be enough to void the sales contract. Also you could (and should!) complain to eBay, though what good that will do I can't tell you. They supposedly have some kind of insurance, but that only covers a few hundred dollars.