My children collect Al cans. It's good to see them collect stuff, turn it in, and get cash. When I was a kid, it was 5c/can, which was huge bucks.
When I got my E-30, it came with a broken sump, holed block, and 5 pistons in the boot. An afternoon separating them, and I learned a whole lot more about what's running under the hood...and got $90 versus nothing for a complete set-up.
BTW, chrome off recycled bumpers in the 50sand 60s is keeping many of your US power station workers alive, and the lights on, due to creating partially out of spec materials.
While contamination is creating dramas in the copper industry.