Jim, why aren't you dropping LED retrofits in those instead of replacing them? If something is already there and the bones/design are good, retrofits are a very cost-effective way to go to LED.
If you insist on tearing them out and don't have any use for them, brass brings good money at the scrap metal yard. I turned in a seasons worth of cracked ball valves from PVB repairs after our freeze a couple of years ago and got $600.00 for them. It's worth the effort to separate the brass, copper and other metals.