LEGO 9735 Robotics Discovery Set is a Mindstorms set from 1999 valued at $171 for new and sealed sets, up 14% from an original retail price of $149.99. Annual appreciation has averaged 1.89% since release. Used copies are valued between $123 and $150 depending on condition.
LEGO 9735 Robotics Discovery Set is a Mindstorms set released in 1999 that centers on the Scout programmable brick with a built-in light sensor. The set includes the Scout microcomputer V1.0, two motors, two touch sensors, and a Constructopedia with instructions for three primary models. Builds include the Bug, which uses touch sensors for navigation, the Alarm, which triggers a shooter based on light detection, and the Hoop Bot, a basketball-inspired model with a kicker and hoop. The Hoop Bot’s kicker uses a clutch gear mechanism, and the Scout can be programmed directly on the brick without a computer.
A new and sealed Robotics Discovery Set is currently valued at around $171, with annual growth of approximately 1%, which is lower than other 1 sets. The average used price is $125 for those in good overall condition. New and sealed listings currently range from $185 to $247. While long-term growth remains positive, recent trends indicate the rate of appreciation is slowing.