How much is a 1934 upside down penny worth?

A 1934 upside down penny, often referred to as a "double die" error, can be worth significantly more than its face value, depending on its condition and the severity of the error. On average, such coins can range from a few hundred to several thousand dollars. Collectors highly value such errors, so prices can vary widely based on demand and the coin's specific characteristics. For an accurate valuation, it's best to consult a coin expert or appraiser.