It is likely a fifty plus year old gun, the buyer needs to assess what they clearly saw. There's been a couple of comments about the salesman. In a "large" store, this person may embellish, but cannot be held to the standard of a Belgian Browning expert, nor signed off on inventory.

I highly doubt the "buyer" would be insulted, but there's a chance they use comments by the misguided expert, as ammunition in a loud buyer's remorse scene in the store. If I owned the store....might have to flag mr helper, for being detrimental to conducting normal and reasonable business.