Collectible coins encompass various types, including historical, commemorative, and bullion coins. In the United States, notable examples include the 20 Dollar Gold Double Eagle and the Braided Hair Cents produced between 1840 and 1857. The 1853 Braided Hair Cent features a distinctive design by engraver Christian Gobrecht, showcasing Liberty with braided hair. Collectors often seek specific years, mint marks, and conditions, significantly affecting the coins' value and desirability.