The value of a 1943 US nickel depends on its condition and variety. In general, a 1943 US nickel in good condition is worth between $0.05 and $0.10. However, some varieties of the 1943 US nickel can be worth significantly more. For example, the 1943-S "Steel Shield" nickel, which was produced using steel instead of the traditional nickel alloy due to wartime shortages, can be worth up to $100 or more. It is always best to consult with a professional numismatist or coin dealer to get an accurate appraisal of the value of a specific 1943 US nickel.