...High Performance" summer tire, so 25-30K would be pretty good mileage and comperable to others of this ilk, IMHO. A couple of Porsche 911 owners I know swear by them year round here in Oregon (I don't think they drive them much in the snow).
The TPT I was referring to has a 65K treadwear limited warranty and is available in both H & V speed ratings in 205/55-16 & H in 215/55-16. I'll probably be putting a set of these on my wife's 420SEL in 205/65-15 as my neighbor across the street has a net set and says they are the quietest & best tires he's ever had on any car.
Finding a pair of specifically matched used tires can be a problem sometimes, that's for sure!