My local dealer has a 2006 X720 with 1055 hours on the lot. It has the 62 inch deck and it's has the "Special Edition" label on the rear of the fender deck. No 3 point. Overall it's in fair to good shape. Starts right up with a bit of blue smoke which instantly goes away. Drives good, differential lock works as it should, pto works, etc. The one thing was when I first lift and lowered the deck there was some noise, but it only did it on the first go through. I don't like where the battery is located, which is a big negative for me, but I'm not sure how easy or hard it is to get to.
He also has a 2004 Cub Cadet 5252E with 60 inch deck, 3 point hitch, with 227 hours. For those who aren't familiar with that model, it's a pretty big garden tractor, maybe a bit heavier than the X720. It has a 25 hp Kohler Command air cooled engine, 2 speed hydrostatic transmission, rear pto, rops, hydraulic lift, power steering, car size battery (which is easy to get to). It looks to be in decent shape, though I question the hours due to the front tire wear (the dealer put a new tire on the left front because the old one wouldn't hold air).
Both of these are the same price, so in all honestly, price isn't what I'm considering. I'm just want to see what other X720 owners think of it, itself, and what issues they have had, etc. I really don't need either one, and that's the option I probably will go in, but I do like the size of both machines and it would be nice to have another mowing machine.