In the category of "what are they thinking?!!!", I emailed this reputable GB seller and pointed out that selling a Damascus gun with 12 thousandths barrel wall thickness was essentially like selling a shoulder mounted pipe bomb. Their response was that they aren't worried because their policy is that all used guns need to be inspected by the buyer's gunsmith before firing. Wow! And the item description strongly implies that it is all original and never messed with....riiiiight. That's really taking the concept of "Buyer Beware" to a whole new level.
https://www.gunbroker.com/item/810636946