Choose 100% metal varieties avoiding the plastic coated ones. This way the can be added to your scrap metal pile and taken to the scrap metal dealer sometime. Mine usually die after a long phone call and I’ve been fiddling with it for the whole time and it is bent all out of shape!
This is completely unrelated but do you remember that guy who traded a paper clip for a house? If you haven't heard about his story here it is here!