I've got some new tires on order and somebody interested in my current tires. I was wondering what would be a fair price to ask for all four. They are the Goodyear Wrangler Duratracs in 265/75/16. They are 10 ply, load range E, and have a 3415 lb max load. They have approx. 20,000 miles on them and are at 13/32''. They come new at 18/32'', so that's about 70% tread left. They also sell new for about $200 each. So does anybody have a suggestion at what I should ask for them and expect to get for them?