so I had this happen a few times now where a bidder swoops in at the last second stealing it from other bidders who did their due diligence BEFORE dropping their bid, sending questions, asking for more specific photos and even coming in person to check it for themselves.
These late comers/snipers bidders then they have questions , concerns and demands AFTER auction is over when they are the winners.
From my experience these bidders almost always fail to perfom and follow through costing you time, money and Ebay hassle to get your final value fee refunded.
Ebay may give them a strike??

big deal
no real consequences
these guys are gambling with our time and often puts a cloud over your item..
yeah sure you can send second chance offers but Ebay warns of scammers using that venue so not really a viable alternative.
I have sent 4 second chance offers on 2 cars and the response was suspicion at best, "why did the first guy not buy it?" they may think there was there something wrong or misrepresented.
Ahhh nothing like having a prospect inspecting it to satisfaction in the flesh.
At least they are within "choking range" GRRR...