David Akers (1975/88): The 1884-S is clearly not a rare date but it is also not in the common date category. In terms of overall rarity, it is similar to the 1875-S, 1877-S, 1883-S and 1902-S although it is not as scarce in Unc. as any of the others. In any condition up to average uncirculated, the 1884-S can be obtained without great difficulty. Choice mint state specimens are only moderately scarce but true gems are very scarce. (The latter statement, it should be noted, can be applied to almost every Liberty Head twenty except a few in the late 1890's and early 1900's. This is because their size, weight and storage over the years have made Double Eagles, like Silver Dollars, especially prone to abraisions.)
The Saddle Ridge Hoard of gold coins, discovered in northern California in 2013, contained thirty-one 1884-S $20s, of which six were Mint State. The best of the lot was a single PCGS MS65, which tied an already existing example for Finest Known of the date.
Saddle Ridge Hoard