I have a Barrie G. Williams custom knife that I would like to trade for a pistol or other firearm. I won this several years ago and I don't really know what it is worth. I think it was valued at $500 at the time. Does anyone know what this might be worth. It is a 7 3/4 inch engraved blade. Overall length is 13 inches. The handle is bone and brass. It comes with a custom sheath and certificate of authenticity. Anyone have any input?