Talking about eBay, by the end of 2023 - begining of 2024, a german seller sold an entire byzantine collection on eBay, mostly solidus and a few silver and electrum issues.
I never asked from where they came (I suspect it was inheritance). The seller had no idea about the pedigree of those coins except for some of them that came with a certificate of authenticity from Ma-shop.
I remember some pretty good deal (sorry no pictures) :
* a solidus of Justin & Justinian (ex-iNumis, ex-CNG (Triton), ex-Harlan Berk) sold for 1600€ (Harlan sold it for around ~3500€);
* a solidus of Justin (probably GEM MS if it was graded) sold for... 420€ (a coin from the same dies and strike quality was sold by NAC for 1000CHF a few years ago, was slabbed and sold this year by Heritage for around a grand);
* a "fine style" solidus of Constantine IV sold for 500€ (ex: Numismatik Naumman, hammer 900€);
* a well struck Hyperpyron of John II Comnenus sold for 400€;
And a ton of other coins that sold weeeeell below their usual market price. I wish I could see such bargains again 😭, it was only a few months ago but it feels like eternity now.
I also saw on eBay a slabbed follis of Anastasius, basic NGC slab, XF, "light" smoothing, no more info', no pedigree. Actually, it was lot n°900 of Triton XXVI being sold for ~1/3rd of the hammer price.
I open a little parenthesis here (more like a rant) :
Later, I realised that coin was first sold at Leu Web Auction 18 in December 21 along with several other Anastasius follis, all those follis were then smoothed, all of them where later sold by CNG during various feature auctions as part of the Iconodule collection, all of them got ridiculously high hammer price (for the type), CNG didn't mention the smoothing for any of them. As a result, I took a closer look at the Iconodule collection and, dear me, there is a quite a number of smoothed / tooled coins in there, sellers tend to omit those "details" 😒.