I chop off the plug part of power cords so I have just normal insulated wire. I have buckets of power cord ends (like that plug into the wall). I heards some of the metal prongs are brass, so I can look for that. As far as the ones that are not, is there anything I can with them? Will anyone buy them as is? Should I just throw them in with shred? Same thing for computer wire ends (that are plastic, but have some non-gold metal). Examples are show below.

Thanks!