The niche market is that you can buy copper pennies significantly below copper spot price, avoiding high premiums and fees. The U.S. government knows the metal value of copper pennies far outweighs their face value. Therefore, they made it illegal to melt, proving the obvious metal value benefits of copper pennies. The U.S. government has attempted to remove pennies from circulation in the past, and inevitably will succeed in the future. Act now, before pennies are no longer a form of currency, inevitably leading to being legal to melt and this market to invest your money in copper pennies no longer exists.