I found a Woods 6215 diesel with a 72" deck serial number 663872. I do not know much about theese mowers. What year is it? Do they have any known problems? How do they handle hills? From what I gather Woods does not manufacture their own mowers, so who built this one? It has about 600 hours on it, whats it worth? Sorry for a million questions but I need to move fast, current mowing set up is finished!