Collectible coins from the United States, particularly from the Philadelphia Mint, often hold significant value due to rarity, condition, and historical significance. The term "1 Roll" typically indicates a collection of 50 coins mint-rolled together, which can include various denominations, including dollars. The year 1981 is notable for specific coin issues that may be sought after by collectors, such as the Susan B. Anthony dollar. Coins from this era are evaluated based on mint marks, design variations, and overall market demand.