Collectible coins include a variety of types such as commemorative coins, bullion coins, and historic coins. The United States has produced numerous collectible coins, including the One Dollar coins, which feature various designs over the years. One notable example is the Standing Liberty Quarter, first minted in 1916 and notably altered in 1917, which showcases Lady Liberty. These coins are sought after by collectors due to their historical significance and artistry, influencing their value in the numismatic market.