Here are 20 rare state quarters worth additional value, according to Gainesville Coins, USA CoinBook and PCGS. Keep in mind that “error” coins — the ones primarily included on this list ...

Article continues below But remember, a coin is only ever worth what someone else is ... So, here are the nine rarest £2 coins - as well as one specific coin you should thoroughly check.

"This is one of the rarest British coins because only a few were ever produced as part of a special minting for record-keeping. "The rarity and historical significance of the coin makes it highly ...

All others are extremely scarce, with only 25 to 50 known examples for each entire coin series. One 1990 example from the more common, but still rare ... just 30,125 were ever produced.

A rare and vast coin collection worth over $100 million that has been buried for years is all set to be sold at the ...