You can find a scrapper on craigslist. The material isn’t really
worth standing in line at the scrapyard for, but a plumber or
electrician who already has scrap will be glad to take it for you.
The pure copper will fetch about $8 per pound, the brass quite a bit
less, unless you could guarantee that it was all the same grade.
I would hand it off in a location other than your jewelry studio.
Scrappers are mostly honest tradesmen, but there are also metal
theives out there, you would so well to stay off their radar.