How much is a Joe Montana US Legends prototype card worth?

The value of a Joe Montana US Legends prototype card can vary significantly based on factors such as its condition, rarity, and market demand. Generally, prototype cards are considered unique or limited editions, which can drive up their worth. Prices can range from a few hundred to several thousand dollars, depending on the specifics of the card and recent sales trends. For an accurate valuation, it's advisable to consult a reputable sports card dealer or auction site.