Niue struck a deal with the New Zealand Mint earlier this year to make collector's editions of the island's currency, ABC Radio Australia reports . Worth $6m Australian dollars (US$5.3m; £3.3m) over the next 10 years, it means that the island receives a royalty payment every time one of the newly-minted Mickey Mouse one-dollar Christmas coins is sold to a collector. Niue is a self-governing state associated with New Zealand with Queen Elizabeth the island's monarch, and it's her head that appears on the obverse of its coins.