Since it looks like the one in the pic, I suppose it does not have a blade, hardnose, rear cable control, or blade trunnions.
Strictly a tow tractor. Could possibly be used with a plow or hydraulic scraper. As a tow tractor, it likely was not subjected to the shock and awe of a dozer, so that is definitely a good thing.
Is the serial number above 14000? Do you know any of the tractor's history, or why it is for sale? Any water in the crankcase? Will the starter spin the engine?
In running condition I would say $6500 would be a ballpark value at our location in Texas. Figure what you can stand for freight. I would guess about $2000 to fix the radiator and grille and change fluids and filters. Worse case if the engine is bad you may sell the undercarriage/track group and part out/scrap the rest and not lose much more than your time.
Good luck with it. Get it bought and show us some pics.
Best regards,
Thomas