I followed the BAC auction on biddr today. Strange affair. 3/4 of the lots didn’t get a bid. I was the highest bidder on two ancient coins. One had 2 other bids, the other none. Maybe auction fatigue is setting in before Christmas. Or maybe the bids were too high on common material.
Sometimes the obscure auctions have fewer collectors on their sites. Their grading seems OK, some opening bids are bit high. There is another obscure auction on sixbid/ they have a Regensburg AV 10 Dukaten Josef II opening bid 5 euros/ estimate 70K euros. Imagine if nobody put in a bid and it goes cheap.
There is a simple way to stop the practice of opening bids that are higher than common material is worth at retail. Don't bid. We will see more of this until the bubble bursts.
BAC's starting bids are always very high, so most of their lots usually go unsold; their buyer's premium and their shipping fees are quite high too. However, sometimes they have a few interesting coins.