I need some advice. I recently (2 mo?) sold a truck that I only owned for a couple months. I didn't like the thing, the ride sucked and it got bad gas mileage. It ran fine and all or most of the issues were sorted, and the only remaining ones were pretty minor (squeeks, rattles, paintwork). Recently, the current owner emails me saying he spent more money on it and still can't drive it. Short email but it had a nasty tone. I have no idea what the problem is, nor could I guess, but I did sell it "as is" and it was in fine shape when I left it. My question is, do I respond to his accusatory email with an honest "I'm sorry, I told you everything I knew, and I thought the truck was fine" or do I just ignore it, since there really isn't anything I can do? I'm not out to screw anybody, and I lost quite a bit of money on the deal, but I just wanted a different vehicle. I don't want to be a bad guy, but I didn't do anything wrong.