As for the least valuable collectible U.S. coins, a blog on the Atlanta Gold & Coin Buyers did an analysis and came up with these four below.

Because of age, rare printings, or interesting features, coin collectors have shelled out serious dough for these 11 dollar coins worth a small fortune.

Check your change jar for these coins from the '90s that collectors have been known to pay hundreds, or even thousands, of dollars for on the resale market.

While eagle-eyed numismatists tend to scoop up rare and valuable coins, junk coins can be easily identified by even the most novice coin collector.

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