I worked at a tree farm for a while years ago, they had a couple of Ford N tractors. I loved driving those things, want one for my property now, but they are pricey even in rough shape.
I'd take any small tractor, really. There are hundreds of ancient small tractors around here, some are patinad decorations in yards, and some are literally rotting in fields. Plus fully restored parade tractors that come out of the woodwork for town festivals.
Problem with antique tractors is that you always spend more money restoring them then they are worth.