Collectible coins, such as those from the United States, can include various denominations and types, including dollars released in specific years like 2005. Coins minted in Philadelphia often feature a distinct "P" mintmark. A "1 Roll" typically contains a set quantity of coins (e.g., 25 coins in a roll of dollar coins), making them an appealing option for collectors seeking to acquire multiple pieces at once. Special editions, such as commemorative coins or coins with unique designs, can enhance their collectible value.