Much of the old machinery ends up at the scrap yard unfortunately, there is just a few people with enough interest to keep a few things like old tractors in complete units. We had a neighbor that ran a sort of parts yard, any old machines sort of ended up there if it could be dragged or trailered it was fair game for him , he sold parts but kep a select few as complete units. There was dozens of old tractors in the mix, many with steel wheels. Up here many suffered cracked blocks from water being left in them when the early winters freeze hit.