I believe, but am not sure, that the displayed bids to which you're referring are the highest pre-auction bids that they receive via online, prior to the actual auction's start. My dealer, who had a colleague at the auction itself bidding on my behalf, relayed the final hammer price to me yesterday after the auction ended. His actual message: " We just got blown away. The coin went for 14500 euros!"
14500 Euro is indeed what it sold for. Coretech has the price listed before it's distributed back to the website/Sixbid: http://www.coretech.cc/CT3/clients/acr/index.php?page=lotShow;saleId=1799;catNumber=511#tabs-3
Just baffling. It makes the preceding lot (a really nice sestertius IMHO) which hammered at 1/10th of that look like a positive steal.
The previous lot had wear which means there are better ones out there. Remember that auction realizations mean nothing about the value of a coin but only what two bidders were willing to pay that day. If, tomorrow, a better coin with no smoothing is sold, the fact that the winner of this one doesn't want another could make the better coin go for 1/10th the price. Auctions don't have to make sense but they sure can make dollars.