Collectible coins include a variety of types such as error coins, commemorative coins, proof coins, and bullion coins. In the United States, notable examples include the Four Dollar Gold Piece, known as the "Stella," which was produced in 1879-1880 and is highly sought after by collectors. The Braided Hair Cents, minted from 1839 to 1857, feature a distinct design and are popular among numismatists. The 1849 Braided Hair Cent is particularly significant, marking the early years of the large cent series. Collectible coins are valued based on factors such as rarity, demand, condition, and historical significance.