Collectible coins, such as the 2017 American Gold Eagle, are popular among numismatists and investors. The Gold Eagle series features a design inspired by classical American themes and is made from an alloy that includes a small percentage of silver and copper, enhancing durability. The coin has a face value of $50, but its actual market value is determined by the current price of gold and its collectible demand. The Gold Eagle is minted in various sizes, with the one-ounce version being the most recognized in the series. Collectors often seek specific years and mint marks to enhance their collections.