Hi to all. I've been reading your posts and still have a lot of questions. I would like to replace my tractor with a commercial zero-turn unit. I'm mowing ~2.5 acres with some slopes and a lot of trees and obstacles. Not being able to justify a new unit I have kept an eye out for a good used unit. Perhaps I should leave brand names out of this to avoid brand-loyal confrontations. Some of the units I looked at had about 1500 hours, some only 800 hours. So, if it served this amount of time beeing worked hard and (perhaps) maintained haphazardly, what would a reasonable life-expectancy be? I realize that I'll still have to replace a belt or a spindle here or there, but it shouldn't nickel and dime me to death either. Is it a fairly safe bet for a homeowner to save $2000 on a unit with high hours or should one spring for the low hour model? (All machines are compareable to each other, having 22-25hp and a 60" deck, being mid-mount riders) Also, I was wondering if there is a 'guide' (like a blue-book) for used mowers. If anyone has a link or info on how to establish a fair market value for used mowers I'd apreciate your help as well. Lastly, what are good indicators of abuse, or - at the same token, a well maintained machine? Any tricks of the trade there? Thank you all for your help.