Interesting situation I heard about, not sure if it's true but raises the question, what would you do?
You buy a pallet of returned merchandise from a surplus reseller. If you're not familiar, these places buy entire semi loads of returned & damaged merchandise from places like Amazon, Fedex, etc then they either sort and sell it or sell by the pallet if they don't have time to sort them all. Supposedly this guy bought a full pallet and found mixed within the other items a firearm in the original packaging but missing a couple accessories.
Would you even open the can of worms trying to take it back to the surplus seller? They are not an FFL, no reason they would have to be receiving said item, and probably wouldn't know what to do with it. Keep it? Call the feds?