I have a 2011 Fastrak 54 with a Kawi FS engine w/80 hours. I mow about 3 acres, all fescue and I want to upgrade to a SuperZ 60". I know it is a bit overkill, but I also mow my parents and inlaws as they are getting a little too old to maintain their lawns. Has anyone worked with a dealer to trade in their model for another? Do you think you would get a fair price on the trade in? Would it be better to sell it outright? Thanks for the help!