Collectible coins refer to coins that are sought after by collectors due to their historical significance, rarity, demand, or condition. In the United States, collectible coins include various types such as numismatic coins, which encompass rare, old, or high-demand coins, and commemorative coins, which are issued to honor a specific event or person. The U.S. Mint produces special editions and releases, including silver and gold bullion coins, along with coins featuring unique designs or limited mintage. Collectors often seek coins with specific mint marks, such as "P" for the Philadelphia Mint, which can affect a coin's value and desirability.