I've often wondered how a dealer might know if I've fired a used gun during a 3-day non-firing inspection as long as I thoroughly clean it before returning it???
I knew a dealer who'd put a piece of cellophane tape down inside one of the barrels. Shooting or cleaning would wipe out the tape.
Sounds like "Urban Legend" to me. It would be really tough for the buyer to accurately measure bore diameter & bbl wall thickness with tape in the bore & not know about the tape & I wouldn't want to deal with the return of a gun to this dealer.
This whole issue boils down to legal responsibility, which is determined (mostly) by the contract between the buyer & seller.
Moral responsibility, which is dependent on what ever concept of morals the seller & buyer have (some people I've known think that they are pillars of the community but skinning someone in a gun or car deal is perfectly OK & just good sport).
And finally, good business practices & from what has been posted about Larry's friend's deal I would think the dealer would want to make it right if he intends to do much in the used gun business but as in most disputes there may be more to it.
