John Deere 2030 Tractors Plowing Dirt Would Anyone Happen To Know What A 1964 John Deere 2030 Or 2020 Diesel Tractor Is Worth?

Would anyone happen to know what a 1964 John Deere 2030 or 2020 diesel tractor is worth? - john deere 2030 tractors plowing dirt

My grandfather, in 1964 to purchase John Deere 2030 or 2020 (not sure what it is), three-wheeled tractor wagon lost a friend. You need only a rough estimate of how much better the tractor. Condtion is in good working order, but not reset or anything. Thanks