A friend of mine looked at a car at that same lot a few years ago. He asked me to come look at the car with him later and when we were pulling up to the place I told him any cars sold at this lot can't be good. Just look at the place, it's some ones house. Once we got out all the cars were dirty and most of them looked pretty rough. I know that not exactly every single one of the cars had to be a pile of junk but 1st impressions tell a lot about a place. On another note, I have found that there is rarely a true great deal on a car, especially at a car lot. No reasonable car lot is going to look at a vehicle and say something to the effect of "Gee, I really want to help someone out. Instead of asking what this wonderfully perfect car is worth, I'm gonna take a lose on the car and take $3000 off of my asking price!" I personally would rather pay what the car books for (give or take) at a reputable lot and get some kind of warranty and peace of mind. Even if the warranty is only 30 days/3000 miles which most good lots have.
Either way I hope you find the problem is simple and inexpensive. I always liked those cars. I drove one when they first came out wanted one ever since. Well, at least till I found out all the problems they seem to have.