LEGO 20217 Action Designer is a Master Builder Academy set valued at $119 for new and sealed sets, up 48% from an original retail price of $79.99. The set retired in December 2014 with annual appreciation averaging 3.50% since. Used copies are valued between $97 and $112 depending on condition. Secondary market prices for new and sealed sets typically fall between $107 and $122.
LEGO 20217 Action Designer is a Master Builder Academy set released in 2013, containing 576 pieces. It provides parts and instructions to build nine models, including a biplane, glider, jet plane, fighter bot, dragster, hot rod, F1 racer, a “Tyrax” creature, and a space whale. The set is organized into three model groups with separately packed bags and companion books titled Flight Designer, Creature Designer, and Auto Designer, each teaching building techniques. Topics covered include aircraft design history, articulated creature mechanisms such as moving limbs and jaws, and the use of Technic elements to create spring-loaded functions.
A new and sealed Action Designer is currently valued at around $119, with annual growth of approximately 4%. The average used price is $99 for those in good overall condition. Based on current trends, this set could be valued near $123 within the next year. New and sealed listings currently range from $106 to $160. The set was available for 18 months, from June 2013 to December 2014.