I agree with Jon, modern engines are not like the old days where you'd have to have the heads of to decoke them and they needed rebuilding regularly. Having a nice low mileage example is good from a vanity / bragging rights point of view, but is no great indication of condition or reliability. Sometimes the worst thing that can happen to a car is it not being used, or only used on short trips, both of which are more likely with a low miler than a high miler. I'm guessing that an 80K example may (not) have had the valley pipe done, a 130K one almost certainly will have. Just IMHO, but I wouldn't be hung up on the mileage, go on condition and history and finding one in the spec and age you're looking for .