David Hall: The 1918-S is scarce in circulated grades, rare in Mint State, and very rare in Gem condition. In fact, in Gem condition it is the rarest regular strike (non-variety) 1913 to 1919 Buffalo nickel. Strike can be an issue and many Mint State survivors show softness of the hair braid and Buffalo's horn and tail. Sharply struck examples are definitely the exception. Luster can be muted or somewhat frosty. In Gem condition this coin is a major rarity.
Heritage 7/2005:10137 -
Heritage 8/2011:7055, $19,550