I've got an uncle who tried to trade off two 9750 machines that just finished a second season. I think that they've got somewhere around 600 sep. hrs apiece, and the dealership wanted $64,000 apiece on trade. He used to trade yearly or every other year, but he says that he will keep these until they fall apart at that kind of depreciation. I've heard about some dealerships out in the wheat belt who won't even take a trade if you've got anything older than a 10 series machine.