Just by the photos, rust appears to be a issue. No spare tire?, might be a sign that the rust may be into the tailgate hinge area and can't hold up the tire? nice shinny tires, they probably also sprayed the engine with that crap to make it look "new".
I bet if you see it in person you will find more rust. If your serious about this thing, I would have them put it up on the lift which will give you a better idea of the rust, bet there are some leaks too.
I say keep looking, and buy the most jeep you can possibly afford.. sometimes its cheaper in the long run