I'm looking at a used Colt 1991 at a local Pawn Shop. It is in good condition and without a box or papers. It is the compact short barrell model all blued, no custom work. They had $499 on it but he told me he'd take $450 OTD. I don't know much about the 1911 so I'm not sure of its value. Are they identical to a 1911 or what?