The 1901-O Morgan dollar is a very common coin in circulated condition and also in uncirculated grades up through the Gem range. While MS64s and MS65s are common and readily found in the marketplace, MS66s are quite scarce and any pieces grading MS67 or better are very rare. PLs are fairly common below the Gem range and very tough at MS65 or higher, whereas DMPLs are rare across the board, with only a handful at the MS65 level.