The 2006-D Kennedy Half Dollars had a mintage of 2 million coins struck, which is considerably low for the series. Examples up to MS65 condition appear to be common. Only in MS66 condition and higher are they scarce. In MS66 there are probably thousands of examples but they require a lot of searching through bags or rolls. In MS67 grade they are much scarcer with less than 100 graded in this condition and none being finer.