I would start out at asking 10K. When I traded my 99 Z71 in on the SS a little over a year ago, it had 145xxx miles on it with a 3 inch body lift 33" tires and a 4.8L motor. They gave me 7,600 trade in on it. Then I looked at there website and they ad it priced at liek 11,500. Its a nice looking truck and everyone like Z71s.