The 1891 Morgan dollar is tougher than many other Philadelphia-mint dates but is by no means categorically rare, as they are readily available in the marketplace. That is the case, anyway, for pieces grading up through MS64. Above that, this coin becomes exceptionally rare with relatively few survivors in MS65 and but a minuscule number in MS66 or better. To be sure, Gems are even tougher with the PL or DMPL designation, for they are essentially esoteric in MS65.