Well I’m not a big Nissan fan and particularly with that mileage, but that’s the reason $3000 in body repairs would have caused the car to be totaled out. The value was down because of the mileage. The damage did not seem that significant but again it should be inspected. If the doors fit good, it drives OK, and there are no red flags from the mechanic, I don’t see a big problem except its a high mileage Nissan and you will never be able to sell it for much. Against my advice, my son bought a rebuilt car when he was in school, at a substantially lower cost and mileage. We never had any problem with it except one rear tire had an alignment problem. Never caused any significant tire wear but just out of spec.
I guess I’d be more concerned about the engine and transmission condition than the body work but as long as you go into it with eyes wide open and not expecting a lot, $1800 is not a lot for a car.