58+ coins are very difficult as they have very low populations and are the highest grade coins for everyman registry sets which makes them more desirable. Coincidentally, I finally just bought a 58+ which I will post pictures of when I get it.
@Mainebill that 1877-CC quarter is WOWZERS! Really nice coins, all of them, but that one is an eye-grabber. Although I was at first wondering where you put your commas: "AU58 Plus, CAC" or "AU58, plus CAC."
I have huge regrets selling it. Needed money. I don’t own any + graded 58 coins. The cac ones could easily get the + if graded today. Much of my collection is in a bit older holder’s primarily pre 2015 when I had a lot of life changes. Just starting to get back into it after a few years off
Couple more 58 cac coins. I have no interest in registry sets or really sets if anything. I just buy what I like.