Having been offered a Hopkins & Allen hammer gun for what seems like a reasonable sum for its condition I have looked high and low for some info and am not finding anything to help. Where did these stand in the order of things in there day? We talking closer to Crescent quality or closer to the standards of the time, Ithaca, L.C. , etc. What would be considered a fair price for a 12ga standard grade hammer gun in above average to very good condition? Thanks in advance.