Collectible coins, often referred to as numismatic coins, include various types based on their historical significance, rarity, and condition. In the United States, collectible coins can encompass a range of denominations, including special editions, commemorative coins, and those with unique minting errors. The 75-cent denomination is not standard in U.S. currency, but numismatic interest can arise from various issues, such as state quarters or bicentennial coins, which may have a higher collector value depending on their rarity and condition. Collectors often seek coins based on specific historical events or popular themes, making the market varied and dynamic.