Collectible coins include a wide variety of types, such as commemorative coins, bullion coins, error coins, and types with historical significance. The United States, with a rich minting history, offers numerous collectible options, including the iconic One Dollar coin. Counterstamped coins, which have been altered with an impression or mark, can enhance the uniqueness and collectibility of the piece. The 1877 coinage period is particularly notable due to the rarity and desirability of specific coins minted during this time, like the 1877 Indian Head cent, often sought after by collectors.