I need new tires soon and I'm gonna get 31s. I was gonna get Firestone Destination A/T's for 640, mounted/balanced and all that good stuff. Now I found these, 4 Firestone Destination M/T's with 15,000 miles on them and 60% tread left, for 450. I'd prolly offer him 400 for them. Is that good deal? I don't want to buy these, then have to turn around and buy new tires a couple months later. Thanks

http://reading.craigslist.org/pts/2423108632.html