I learned of an '82 Audi 4000 coupe in my area for sale. It's s'posed to have about 52 K miles, and be in excellent condition, new brakes, newer tires, good maintenance records. This is the 2 door "GT" version with the 5 cylinder engine. I know the 4 door/4 wheel drive Audis of the early to mid 80's were highly desired but dunno how much this one should fetch. I'm thinking about it for a driver/something to play with. Any idea about it's worth?