Why is a JD 50 is worth more than a 70?.

Usually the 50 does not go for more than a 70, all things being equal. I suspect that you are looking at two ends of the spectrum. $5,500 for the 50 is a little high unless it is in completely restored condition.

$3,500 for the 70 sounds just a little low to me, and I suspect that its probably not in as good a shape as the 50 you saw.

I think overall the value of these machines is on the rise. Generally speaking, a 50 in good running condition with everything working can be had for around $3000, and compared to new tractor prices for an equivalent machine, thats a pretty good deal.

For me, the 50 is more valuable for the limited work I do. I like the 50s smaller size for manuevering around tight areas, and I like the fact that the 50 is pretty good with gas.

If I were working a real farm like the real farmers do then I'd be inclined to want the 70.

John
1953 Model 50