After WWII many armoured vehicles got sold off as scrap and got reused for many things. Dowunder they often got used for "bush bashing" - clearing scrub to make farmland. I remember many decades ago as a kid going to visit my relatives in the Wheatbelt in Western Australia, to discover one of their neighbours had an M3 Stuart Hull sitting in their shed. I've often wondered if it would be worth going back to find out what happened to it (and if it would be worth recovering).
I've also often driven through the country town of Murraylands in far NW Victoria. Just off the highway is a scrap yard which is visible from the highway. In it are nearly a dozen Mathilda and M3 Medium hulls. None are, I've been advised by friends in the military Museums circuit worth recovering, as they're pretty well had it and lack all mechanical internals (and apparently
they've checked them out). However, it does break the heart to see them slowly rusting away.