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Message:: [QUOTE="AUBU2, post: 636948, member: 11120"]Present Census  What your current census does'nt show is the grading ratio through the years. The ratio was lower as i remember back in 2003 & 2004(for the 2001 coin). I think it would be interesting to look at the ratio's on those coins after each year. Two factors(1.) The ratio of PF70's (2.) The total number of PF70's. The 2000's ratio is a little lower, but there are many more 2000's graded PF70 available(because it was the first year i assume, more were graded). Your current census shows that there are only 819 PF70 2001's available. And for every 100 more coins sent for grading only 12 will be a PF70. The 2001 will probably always be the key coin for PF70 sets(currently 819 PF70 sets maximum/ i'm not counting 2008 since it will pass the 2001's when more are graded). Total mintage, total graded PF70, the grading ratio all contribute to a coins value. Using those three factors shows the relative price strength of the 2000, 2001, & 2004 proof Sacagawea dollars. The 2000 isn't priced higher than the 2001(although they have similiar PF70 ratios), since the 2000 has a mintage almost a million higher than the 2001. It's my theory & i'm sticking to it! If you went on mintage alone, the 2008 would be the highest priced(and it's not).[/QUOTE]