An inherited box of old coins can look like a small fortune. Maybe your father saved wheat pennies for decades, your grandmother collected silver dollars, or a relative left behind albums filled with unfamiliar dates and mint marks. Before taking those coins to a bank or selling them online, it’s worth understanding what actually makes a coin valuable. Some coins are worth little more than their face value, while others can command substantial premiums because of rarity, condition, or precious metal content. The challenge is separating genuinely valuable pieces from coins that simply look old.