A 1255 is definitely worth more than a 1250. You can get parts for the 1255! I would think the 4x4 would add to the value, and there are some people collecting the Fiat built Olivers. If it has a loader, someone will buy it just to use it. Here in Michigan, I would guess that it would sell for around $6,000 without a loader, $8,000 or more with one (in good shape.) Dad was never fond of them, so we sold hardly any of them. But the people I talk to say they are a really handy tractor to have around.