Smith & Wesson makes an excellent one. I have a 5" M625, very accurate (my most accurate handgun), but why would you want a used one? Ruger makes a .45 convertible (LC & ACP) Blackhawk that is fun also. A friend has a 3" M625, but accuracy wise it does not complare to my 5" version. Save up and get an M625, you will not regret it. Ron