A lot depends upon condition. With only 615 hrs, I'm assuming yours is in pretty good condition. I got mine cheap last spring, $2500. However it needed lots of little things, rear tires, it sould use a paint job, and I still need to fix the 4wd so that it will shift into 2wd. So mine probably isn't a good comparison. Check out the site tractor house. It should be a good way to guage the value of yours. Remember that the dealers are probably going to ask more than you can realistically get and, just like a car, if you trade it in you probably won't get what you could selling out-right.