I was at my Audi dealer getting an oil change, and I saw they had an '02 S8 on the lot with 78k miles(car appears to be in beautiful shape). They want 19,000 for it. My question is, is this a good deal providing it has the service records, and I talk them down to about 17,000? I have always wanted an S8.... It's a dark green color with black leather and GPS Nav.....