I went back and looked at my catalog for that auction and I see what you mean -- a large number of moderately priced Flavians. Plus, most of the Sneh collection went for estimate or lower. Exactly -- the "demand" side of the "supply and demand" principle is at work for these coins. Note that the same principle applies to Ides of March denarii; even though there are over 100 known to exist, the prices are generally stratospheric for even the poorest condition of these coins.
Both Gemini IX and X featured coins from Harry's collection. Also, if you search on the CNG website for 'Sierra Collection' those are Ex Harry Sneh too. Truly a staggering collection of Flavian raities. Many of my rarest Titus denarii are Ex Harry Sneh, offered to me before those sales. Oh, the fun we had discussing those coins!
this is the normal cos III sestertius overated coin https://www.acsearch.info/search.html?term=cos III capta sestertius&category=1-2&en=1&de=1&fr=1&it=1&es=1&ot=1&images=1¤cy=usd&thesaurus=1&order=0&company= still it is a beauty from a coin
Those must be great memories. I never knew the Sierra Collection was Ex Harry Sneh. If I could only keep one coin from my collection, this one would be high on my list, ex Sierra Collection. I like it even more as Ex Harry Sneh!
For the benefit of those new to the subject, Nemo's denarius is the better of the two choices we see in silver with the seated Judaean. Behind is a tree and the hands are tied behind the back. More common is the type with the figure holding head in hands and seated under a military trophy. Both are quite collectable but the tree type is several times more scarce.