I had been researching tractors in this size range for a while up until I bought a B2920 three weeks ago. This sounds like a fair deal to me if the tractor is in decent condition and if it appears to have had fairly decent maintenance. If the oil and hydraulic filters are still gray that is a clue the maintenance has been lacking. This would particularly concern me if the engine oil filter was still gray. Look for leaks around engine and underneath prior to running it. Get it hot then check again. Check the clarity of the hydraulic fluid. It shouldn't be dark. Make sure every lever on it does what it is supposed to do (shifts, raises, lowers, etc.). Run it through its paces. If you find nothing concerning I think you would be doing well at this price. If the dealer doesn't already have them, ask him if the man who traded it in has the manuals mentioned above. If so, ask them if they can get them from him. Make that part of the deal.