Anyone have an idea of the value of this rolling block pistol ? It's as tight as new, ( not there is much that can not be ) and right now has a .38 special barrel installed. I have the original .50 caliber barrel which has a mirror bore with 100% rifling. I think it may have been re color case hardened but I'm not 100% sure. The wood has not been sanded and has a great inspectors cartouche . I have not seen many of these, and to be honest they are not really my thing, that's why I could use some help.