I disagree with Norse's.
While I'm VERY happy for you to score so big, I wouldn't be quite so proud of taking advantage of the obviously uninformed seller. Maybe, I'd have given the guy $200 like he asked. Then at least he'd got what he needed and you would still have a VERY VERY good deal. In time, the extra 50 bucks won't matter to you. I've been both seller and buyer in such deals. I sleep better when nobody gets exploited.
