The price seems right if it's in good condition. The Perkins 3 cylinder diesel engine is said to be darned near bulletproof. If it runs and functions as it should, I'd say it could be a good buy, but you'll have to carefully evaluate it to make that determination for yourself.
It's difficult to tell by looking at a single picture with little or no description, but it appears to be all original with good sheetmetal and what appear to be decent tires. It has power steering, and it also looks if there might be a differential lock pedal, which would be a huge plus if has a differential lock. The alternator, orientation of the air filter, and solid red front rims seem to indicate that it's a late 60's or early 70's model, probably the latter. The spin in/out rims can be a plus or a minus, depending on how you plan to use it, but replacing them can be expensive so I'd look for signs of rust. Some damage (busted headlight & dented grille) is evident, but nothing that would cause me any concern.
There is some yellow present on the seat pan, which could indicate that it's from an industrial model tractor. Judging by the swept-back front axle, the tractor itself appears to be a standard ag tractor, but it's something to watch out for if it concerns you.
Lastly, I cannot tell if it has multipower (control on lower right side of the dash), but many consider multipower to be a negative because it never seems to work right and can present a safety hazzard on hills due to the possibility of free-wheeling in low range.
