A Bicentennial Quarter and five rare dimes might not make you $250 million richer, but some coins – like the 1975 No-S Dime or 1894-S Barber Dime – are worth hundreds of thousands or more. Learn how to spot rare coins by checking mintmarks, overdates, and coin grade. Visit trusted grading services like PCGS for evaluations and stay informed to unlock your collection’s hidden value.