Though a very high mintage date that's very common in all grades up to MS64, the 1961-D is actually one of the rarer 1941-1964 Washington quarters in Gem condition. Marks are a big issue with this coin as surfaces as usually pretty rough. Most Gems are frosty white, as toned Gems are in the minority.
1961-D is one of the great condition rarities in the Washington Quarter Dollar series. Collectors compete so intensely for top quality examples that the prices are now solidly into five figures for MS67s. Those of old-timers who were used to seeing 1961-D Quarters just about everywhere in circulation, we marvel at these lofty prices. However, this is merely a reflection of the demand for quality, and the lack of it, where this date is concerned.