You could be holding a coin worth over $201,000 without realizing it. From minting errors like the 2004 Wisconsin Quarter to ultra-rare gems like the 1894-S Barber Dime, these six coins have broken records at auctions. This detailed guide explores each coin’s value, rarity, and history — plus expert tips on how to identify and preserve potential treasures in your collection. Don’t toss that change just yet—it might be gold!