Your point may be valid, if you are a "trader", but if, like me, you believe in keeping and shooting an older quality gun, for its intrinsic value if nothing more, than the money spent is money well spent--IMO anyway. I don't buy older American shotguns (Model 12's and L.C. Smiths mainly) to sell later on, I buy them to keep and shoot.
I am not talking about buying and selling. I am simply stating that he will have more into it than the gun it is worth. If he wants to do that, it is completely fine with me. He was the one that ststed that he was woried about being upside down in it.