Some valuable American nickels that occasionally circulate include:
War Nickels: During World War II (1942-1945), nickels were minted with 35% silver content due to the wartime demand for nickel. These nickels are easily identifiable by the large mint mark above Monticello on the reverse side.
Buffalo Nickels: Minted from 1913 to 1938, Buffalo nickels feature a Native American profile on the obverse and a buffalo on the reverse.
Early Jefferson Nickels: Some Jefferson nickels minted in the 1930s and 1940s, particularly those with certain mint marks or errors, can be valuable to collectors.
Remember, the value of a coin depends on various factors such as its condition, rarity, and demand among collectors. Always consult a reputable coin dealer or reference guide for the most accurate information regarding the value of specific coins.