Collectible coins include a variety of types, including historical coins, commemorative coins, and bullion coins. In the context of the United States, collectible coins often feature denominations such as the Half Penny, which was used prior to the 1776 independence of the USA, alongside other colonial coinages like those minted in 1773. These coins can hold significant historical value and appeal to collectors due to their rarity, condition, and connection to early American history.