How much would an old tank bullet be worth?

The value of an old tank bullet can vary widely depending on factors such as its age, condition, historical significance, and whether it is still live or inert. Generally, inert bullets or shell casings can range from $10 to several hundred dollars, while live munitions may be illegal to sell or own in many places. Collectors and military enthusiasts may pay a premium for rare or historically significant items. Always ensure compliance with local laws when dealing with military ordnance.