LEGO 9641 Pneumatics Add-On Set is a Education set currently valued at $248 for new and sealed sets. Annual appreciation has averaged 7.39% since release. On the used market, values range from $137 to $229 based on condition. Secondary market prices for new and sealed sets typically fall between $148 and $276.
LEGO 9641-1 Pneumatics Add-On Set is a 31-piece Education set released in 2008. It was designed as an expansion for the Simple & Powered Machines Set 9686 and includes a selection of pneumatic components such as pumps, cylinders, switches, tubing, an air tank, and a manometer. The set also comes with full-color building instructions for four real-life pneumatic models. Its parts assortment includes several specialized pneumatic elements, including trans-light blue pumps and cylinders, dark bluish gray switches, and a trans-clear pressure gauge.
A new and sealed Pneumatics Add-On Set is currently valued at around $248, with annual growth of approximately 5%. The average used price is $206 for those in good overall condition. New and sealed listings currently range from $163 to $290. Based on current trends, this set could be valued near $265 within the next year.