2 Dollars - Charles III R2-D2 and C-3PO

Niue has sold its sovereign coinage rights to novelty licensing programs for decades, functioning less as a monetary authority and more as a vehicle for collectible issues that could never circulate anywhere. This particular piece is part of a wave of Star Wars-themed silver coins produced under Disney's licensing umbrella, a commercial arrangement that has generated dozens of near-identical $2 face-value issues from the same tiny Pacific territory since the 2010s.

The face value is nominal — at current silver prices, the metal alone exceeds it by a factor of roughly 25.