A rare 20 cent coin from the 1970s is worth up to 400 times ... That’s because of its rarity, with the Royal Australian Mint only creating 8.9 million of the coins making them "one to hold ...

A collection of rare Australian ... seeking a more recent coin there is this unique one dollar issued in 2000. The Royal Australian Mint accidentally used a 10 cents planchet instead of a $1 ...