Collectible coins encompass various types, including historical coins, commemorative issues, bullion coins, and foreign currency. In the United States, notable collectible coins include state quarters, presidential dollars, and the American Silver Eagle. The Peso, a currency used in several countries such as Mexico and the Philippines, also has collectible versions, often featuring unique designs and historical significance. Collectors often focus on factors like rarity, condition, and historical context when evaluating these coins.