What is the top dollar on a NIB ruger cap & ball revolver? and if I dont like it, how much will it be worth after I shoot it a few times? when did ruger stop production on them ? is there an interchangeable drop in cartridge cylinder avalible for them? I have read they are among the most accurate BP hand guns so what kind of group shoud Iexpect at 25 yards? thanks so much, Lazarus