Mintmark: The mintmark "F" indicates that the nickel was minted at the Philadelphia Mint. Nickels minted at the Philadelphia Mint are not as rare as those minted at other mints, such as the Denver or San Francisco mints.
Condition: The condition of the nickel is another important factor in determining its value. Nickels that are in mint state (MS) or near mint state (MS+) have a higher value than those that are circulated or have damage.
Rarity: The rarity of the 1935 F US nickel also plays a role in determining its value. While the 1935 F US nickel is not particularly rare, it may still be more valuable than other common date nickels if it is in good condition.
Overall: Based on these factors, the value of a 1935 F US nickel can range from a few dollars for a circulated coin in good condition to several hundred dollars or more for a mint state or proof coin. It's important to consult with a reputable coin dealer or use a reliable coin pricing guide to determine the accurate value of your specific nickel, as values can fluctuate over time.