When people think of buying a used car, they look for an honest seller who has kept the car in good condition. The problem is that you can't always trust the word of the owner... they may not reveal every repair that was done to make the vehicle drivable. Always test drive a used car to make sure you don't get a lemon.
Because your personality is comparable to a used car, it implies that you've been on many adventures and have quite a history! Strangers may be a bit wary of you, but your charm and old school vibe usually wins them over. You're unpretentious, pretty humble and down to earth - and this makes you quite easy to get to know. You're comfortable to be around but you carry a bit of baggage, and past events may sometimes surface to damage your relationships.