Before you place that old non-ferreous metal item at the curb for the trash man to pick up, think about this:
Today I was doing some spring clean up and needing to dispose of some useless sheet metal items that had been used as donor parts for a recent restoration, I decided to take the stuff to the local re-cycle place. Not worth much and my garbage pickup won't handle it, so what do you do? 180 pounds of old sheet metal, springs etc. netted $4.50 and they're gone. I also took two old radiator assemblies, a '26 with a modern core and bent up tanks, a '27 with honeycomb core, split from top to bottom, with usable tanks, maybe. I had carted both radiators to many Swap Meets over the years with a $20 price tag on each with no takers. I was tired of walking around them. The Re-cycler paid me $47.15 for the pair, 41# total @ $1.15/lb.
A couple of months back I took four aluminum alloy wheels to the same re-cycler. Those wheels had corrosion at the bead seat areas and had difficulty holding air pressure, so I wasn't comfortable selling them to anyone. That netted me $49 and change for the four wheels.
The moral here is, years back you couldn't give this stuff away and much of it ended up in a land fill. Today, someone is willing to pay you for it.