As a 1962 it should have the larger (149 ci) engine and true independent PTO and hydraulics. These are pretty good 30 HP two wheel drive tractors. I bought a 1963 D-12 (Snap-Coupler hitch)with loader for $3300, but it wasn't running very well at the time and the clutch was stuck so I couldn't fully check it out. On the plus side it had less than 2000 hrs. and, with a carb rebuild, runs well now.
The D-10 you describe has apparently had some hard, long hours (otherwise it wouldn't have the rebuilds). I wouldn't think it would be worth much more than $4000, maybe $4500. At an auction, could go up to $5000. If it doesn't have a true 3-point hitch or adequate conversion, expect to spend about $450 for an adapter.