The experts at MMDIY share the best ways to clean coins of all types without devaluing them. Follow our simple steps to clean old, tarnished or corroded coins!

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They have yet to learn the value of some of these coins! Listed below are 12 examples of pennies you should collect:

What to do with coin collection? Do you sell it? Do you keep it in a safe deposit box or keep adding to it? That’s the question.

What is the most valuable coin in the world? (A U.S. coin worth over $18M!) Here's an updated list of the most valuable U.S. coins by denomination -- from pennies through dollar coins.

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Do you notice anything different about this quarter? Believe it or not, this quarter sold on eBay for $35,000.

Easy Disappearing Coin Trick. All you need is a glass jar, water and a coin. Amaze your friends with this simple science trickery!