I'm looking at a 1968 4020 that's up for auction in a couple days and I'm wondering what a fair purchase price would be. It's a power shift and seems to run and drive good. I only drove it when it was cold so not sure if something could act up after its up to operating temp or pulling it hard. It has 16.9-38 tires that will probably need replaced if a guy wanted to use the tractor in the field. The tractor has 2 remotes and the 3 point hitch is complete and operational. The only major problem I see is that the PTO doesn't turn off which I've heard could be as simple as a linkage issue or could be an expensive fix if the tractor has to be split. I'm thinking a fair price for this tractor would be $5500-6000. What do you guys think?