I’m planning on selling some airguns from the collection of a deceased club member. The one in question appears to be a customized Crosman? It’s now a .440 round ball shooter and has been used to dispatch at least one whitetail. The custom work was nicely done but there are no markings or other clues other than the bore dia. Any information about this gun and approx. value (including the 2X Leupold) would be appreciated. Uj