Collectible coins are coins that possess value beyond their face value due to factors such as rarity, demand, historical significance, or aesthetic appeal. In the United States, notable examples include the One Dollar coins, which have featured various designs over the years, including those commemorating significant events and figures. Roosevelt Dimes, first issued in 1946, are popular among collectors, particularly those from specific mint years or with unique errors. The 1979 coinage features the Eisenhower Dollar, while specific mint marks and variations can significantly impact their collectible value.