LEGO 845 Battery Motor, 9V is a vintage Basic set from 1992 valued at $39 for new and sealed sets, up 201% from an original retail price of $12.99. Annual appreciation has averaged 3.34% since release. Used copies are valued between $22 and $30 depending on condition.
LEGO 845-1 Battery Motor, 9V is a Basic Supplementaries set released in 1992, containing 27 pieces. The pack includes a 9V battery box with red buttons, a 9V electric motor, a long 9V wire with brick ends, a Technic axle and brick with holes, and a selection of wheels and tires. It was designed as a power accessory for 9V-era builds, enabling simple motorization of Basic, Technic, or train models.
A new and sealed Battery Motor, 9V is currently valued at around $39, with annual growth of approximately 2%, which is lower than other Supplementaries sets. The average used price is $23 for those in good overall condition. Based on current trends, this set could be valued near $40 within the next year. New and sealed listings currently range from $35 to $43.