2008 was the only year the U.S. Mint released the fractional buffalo gold coins. This included the $5, $10, $25 and the regularly released $50 gold coins. Because the fractional set was only released in 2008 they are extremely hard to come by. Fortunately we have a very limited set that includes both the $5 mint state Gold Buffalo AND the $5 Proof Gold Buffalo. Not only that but BOTH coins are certified PERFECT 70 by NGC with the special "Early Releases" label indicating the coins were made in the first 30 days of release.