Regarding the 1808 nonoverdate issues (BD-3 and BD-4), David Akers wrote in his series of references in 1975 and 1988:  

'The 1808 is far more common than the overdate in all conditions and undoubtedly at least 75% of the recorded mintage was made up of normal date coins. Although not particularly rare as a date, in my experience the 1808 is very difficult to obtain in choice mint state. Certainly it is much more rare in uncirculated condition than the 1807, 1809/8, 1810 Large Date, Large 5 or 1812.'