Ok i am looking at a 1994 Mercedes c280 it has 138,000 miles and cost $4,650. It doesn't have a scratch on it. Its paint, tires, and everything else is good. the inside is amazing too. Right now i have a 1989 Mercedes 260e and is old bad paint slow and we have put a lot of money in it? what should i do sell my old car and get that one? if so sell for how much?