Collectible coins include various types such as historical coins, bullion coins, and specific denominational coins. The 1945 D dime, minted in Denver, is a part of the Roosevelt dime series, commemorating President Franklin D. Roosevelt. The value of this dime can vary based on its condition, with uncirculated coins commanding a premium. Collectors may seek 10c rolls, which can contain multiple dimes from this era, enhancing their appeal due to potential numismatic value and historical significance.