Not sure what you're asking here. Are you talking about the empty brass or steel casing? Yeah, they're worth something. If it's Boxer primed, it can be reloaded with relative ease. You probably won't sell Boxer primed steel or aluminum cases to a reloader, though some guys do pick them up and reuse them. The premium will be for Boxer primed brass cases in commonly reloaded calibers, and you still won't get the same price for once fired brass as you would for brand new unprimed brass, even if you process it (clean, size/deprime, remove primer pocket crimp if necessary).
If it's Berdan primed, it can be reloaded, but there's extra effort involved in removing the primer, and then you have to actually find Berdan primers (they're out there, though).
If you're looking to recoup a little money from your empty cases, you can do it. If it's brass and Boxer primed, you can sell it as once-fired. If it's not (steel, or Berdan primed brass), you will probably do better to sell it for scrap metal value.