David Akers (1975/88): The 1891 is one of the rarest Philadelphia Mint Liberty Head Double Eagles. Of course, it is not as rare as the low mintage P-Mint issues from 1881-1887 or the excessively rare 1861 Paquet, but it is on par with the 1859. It is a little more rare overall than such rare issues as the 1862, 1868, 1871 and 1873 Closed 3 and at least as rare as any of them, if not more so, with respect to condition rarity. Most known 1891 twenties are EF or AU and all have prooflike surfaces. I have seen only a few true uncs (three or four pieces).
Dallas Bank Collection - Sotheby's 10/2001:111, $80,500 - Richard J. Chouinard Collection - Heritage 1/2005:30540, $155,250
Heritage 1/2010:2267, $138,000