Collectible coins often include significant types such as the United States one-dollar coins and Buffalo Nickels. The 1913 Buffalo Nickel, minted in Denver, is particularly notable due to its rarity and historical significance. Collectors highly value this coin for its design by James Earle Fraser and the limited mintage associated with its year of production. Buffalo Nickels are also celebrated for their depiction of Native American imagery and American bison, making them a popular choice among numismatists.