It's worth it here if you sort it. Brass, copper, ect. Box springs from mattresses with the stuffing ripped off. Aluminum and steel is always good.
It's SO worth it apparently, that people will break into foreclosed houses and steal the copper pipes and brass door knobs from older homes. Or the brass flower urns at cemeteries. Continual running adds for "scrap wanted". It takes about 5 minutes to find someone to come get it. Or have it stolen. My brother always has scrap from his work, and they'll cut through the chainlink security fence to get it. And take the section of fence they cut out! Because of all the theft, you have to show some ID when you sell it, and they look for things like large amounts of pipe.
We've made several hundred just from goofy things. FIL made several hundred from cleaning out his garage. My dad too, he had a pile of car parts.