I sold a near new, but fired, BSS sidelock 20 ga with no case on this board last Spring for $5800. A NIB one in a case is worth AT LEAST $6000. You'd be stealing it for $4000. Very few were made and they are a very high quality H&H pattern sidelock. Ken is right; Jimmy is talking about the BSS boxlock, an entirely different gun.
Joe Bernfeld