David Akers (1975/88): In terms of overall rarity, the 1868-S is just a little less rare than the 1866-S Motto and 1867-S. It is essentially the same rarity as the 1860-S, 1861-S, 1862-S and 1864-S. Like most S-Mint issues of this era, the 1868-S is generally available only in EF or lower grade. In fact, in my experience, the most often encountered 1868-S is a heavily bagmarked VF. In AU, the date is definitely rare and in full mint state it is very rare. I have seen only a couple of Unc-60 examples and cannot recall ever having seen a choice or gem quality specimen.
Goldbergs 9/2008:1593, $28,175