LEGO's Nexo Knights Key Chains subtheme features a series of key chains released in 2016 and 2017, each showcasing a minifigure from the Nexo Knights universe attached to a sturdy metal ring and chain. Notable characters include Aaron, Clay, Macy, Lance, and the antagonist Jestro.
Summary
Gear Key Chains / Nexo Knights Aaron Key Chain set 853520 was released in March 2016, retailing for $6, but has since been retired. New, unopened Aaron Key Chain sets are valued at $9, while used sets can be found for $7.
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