Collectible coins, particularly within the context of the United States, encompass a variety of types, including commemorative coins that celebrate significant events, individuals, or themes. The 2005 Modern Commemorative Coin Sets include coins issued to honor specific anniversaries, national parks, and historical figures. These sets often contain limited mintage coins, making them appealing to collectors and investors alike. The 1 cent (1c) denomination coins, though typically lower in value, can also hold collectible significance based on their rarity, condition, and placement within specific sets.