Honestly I don't know what it's worth. I know it's hard to find these, especially fully polished but I couldn't even find one to compare to for price. I'll say $500 (includes shipping) and if I'm crazy let me know..
The last one I saw at a swap meet was selling for $325 (in Omaha) but it wasn't polished. It didn't sell but it may give you an idea of what others have asked for one.