Collectible coins encompass a wide range of numismatic items, including historical coins, bullion coins, and commemorative issues. The United States offers several types of collectible coins, with the American Gold Eagle being a notable example. Introduced in 1986, the Gold Eagle is available in various denominations, including the 50 Fifty Dollars version, which contains one ounce of gold. The 2006 Gold Eagle is part of a series that retains significant collector interest due to its gold content and aesthetic design.