Interesting topic. Good question.

Living in Australia's far north means that most firearms offered for sale are a long way from an inspection, usually several thousand kilometres, so my "question" is always about sending it back if not as described.

If the issue is one that the average seller might not have recognized, I am happy to freight back at my expense. Accepted cost of living in the Top End. If the seller was dishonest, I would be seeking freight reimbursement, with threats of taking it further if necessary.

Over the last 40 years or so I have only had to do that once!

Items listed for auction are a whole new ball-game of course. I never bid unless I trust the auctioneers, or am prepared to accept the worst-case scenario.