American Buffalo gold bullion coins were the first .9999 fine (24-karat) gold coins made by the U.S. Mint. They are struck at the West Point facility and distributed in the same manner as American Eagle gold bullion coins. In 2006 and 2007, only one-ounce coins (with a $50 face value) were minted. In 2008 the Mint also produced half-ounce ($25 face value), quarter-ounce ($10), and tenth-ounce ($5) pieces in Proof and Uncirculated, individually and in sets.
Values change frequently and are based on prevailing bullion and fabrication costs relative to the weight of each denomination.