Last I remember was Anduck having a few of the errors sold/auctioned here on the forum.... but think they were ICG slabs, not ANACS.
As it stands, I have seen some raw coins go for in the 1.2 range, showing that premiums are slowing picking up.
I would think that now that they (ANACS) no longer grade crypto, this may lend itself to getting a higher premium.
And any exposure on a secondary platform can also increase this, as we have seen on places like Scarce City and Ebay.
Thanks for the info MJ. I had never heard of Scarce City before, so I went to take a look and saw a coin I sold on here in 2017. Glad to see it hasn't been peeled and is still in circulation.