Collectible coins, particularly in the United States, encompass various types and denominations, including notable examples like the Buffalo Nickel. The Buffalo Nickel, minted from 1913 to 1938, features an iconic design on the reverse side, depicting an American bison, while the obverse showcases a Native American. The 1927 Buffalo Nickel is particularly sought after by collectors due to its distinctive design and historical significance. Additionally, the U.S. three-dollar gold coins were minted in limited quantities during the 19th and early 20th centuries, further enhancing their collectible appeal among numismatists.