If I understood your first post, the modded car has exterior dings and a ripped seat. It doesn't sound to me like the owner took especially good care of it. You would never find dings or rips on any car I own, regardless of mileage or age. Typically, I expect modded cars to be owned by people who appreciate them and take good care of them both mechanically and cosmetically....but that is not always the case. Also, while Livernois tunes and performance mods are generally safe, a modded car that has been driven hard would concern me more than a stock one in terms of mechanical wear and tear. If a car is going to be driven hard or raced, I want to be the one doing it!
The repairs on the 2011 sound like a good thing. That would make me more comfortable with it, along with the fact that it has never been modified and very likely never raced. It would be a great basis from which to do your own mods. Just a tune would bring the 0-60 down to the low 4 second range.
