That is a lot of hours on an 07. Was it a rental machine? Those should probably be avoided. My 05, 4120 only has about 400 hours on it, but I do have (5) other tractors. The first tractor I ever bought was a 1951 Ford 8n, back around 1990 and it only had 1200 hours on it then. In the long run, 1200 hours is just barely broken in, and I have never seen another original 8n as tight as that one was back then. As others have said, hours alone dont make it bad, but how those hours were applied, and what maintenence was done, may. A rental or all-loader use would be red flags. Dont be afraid to low-ball the price. Those hours should make it real easy for the sell price to end up much less than the asking price. In my opinion, you wont find a better tractor in that class than a JD 4120 powerreverser with 400X loader (I would not have bought one if that were not the case).