The Cornelia Supera is not necessarily overpriced. A few of her silver antonininii at auction have gone for well over $10,000
This made me curious so I did a little quick research. (Actually I suppose you could call it "fact-checking".) 8 examples of this type are recorded on ACS over the past 5 years. (That goes back to 2019, before the COVID-era price escalation period, so it includes some 'bargains' relative to today's prices.) The average hammer price of the 8 was $9.596 not including auction fees. Allowing for a 15% fee added to the hammer means there was a $11,035 average cost-to-the-buyer. So, a listing at $10,656 (with no added fee required) is actually a below-average-cost, making it sure enough true that it is... "not necessarily over-priced". At the same time, for my collecting budget (which certainly isn't bargain basement), spending over $10K for a coin feels over-priced. :-o It far exceeds what I would/could ever spend for a single coin. But for those many ancient coin collectors who aren't economically challenged, $10K is probably about like me buying a $750 coin. So for ME... this coin is over-priced for MY budget... but it isn't really priced above its value based on what people have historically been willing to pay over the past 5 years.