Collectible coins encompass various types, including rare coins, commemorative coins, and bullion coins. In the United States, collectible dimes, such as the Mercury dime and Roosevelt dime, are particularly sought after by numismatists. A "10c Roll" typically refers to a roll containing ten-dollar face value of dimes, which may include a mix of circulated and uncirculated coins. Collectors often focus on the coin's condition, rarity, and historical significance when assessing value.