Many years ago I was visiting relatives in West Australia. We went for a drive around the area and after rounding a corner there was an M3 Light Tank, sans turret and some armour. When I mentioned it to my relatives later, they said, "Yeah, thats old Jonesy's he bought it after the war and converted it into a tractor and ran it for a few years on his property." Most probably still there, rusting away today.
Over a decade later, on the other side of the continent, I was on a train traveling from Adelaide to Yass, just north of Canberra when I noticed out of the window of the train an M3 Medium converted to a crane being used to repair a rail section which was damaged. I never discovered who used it or owned it.