LEGO 900 Universal Motor Set is a vintage Basic set from 1973 valued at $370 for new and sealed sets, up 4126% from an original retail price of $8.75. Annual appreciation has averaged 7.32% since release. Used copies are valued between $49 and $60 depending on condition.
LEGO 900-1 Universal Motor Set is a Basic set released in 1973, containing 32 pieces. Designed as a 4.5V power accessory, it includes a motor, battery box, electrical leads, wheels, and rubber tracks to motorize custom builds from the era. The set is functionally the same as set 103 “4.5 Volt Motor with Battery Box, Wires & Wheels” and 103 “4.5V Motor Set with Rubber Tracks,” issued under different numbers/titles in various markets. It belongs to LEGO’s 1970s 4.5V system, intended to add powered motion to Basic sets. Based on current trends, this set could be valued near $395 within the next year.
Universal Motor Set (900-1) is a very old and rare LEGO set. It has not been available online or in retail stores in good/new condition for over 2 years. Because of its scarcity, the current estimated value of in new condition of $369.79 may be much lower than its true market value. Released in 1973, sealed sets in good condition are especially difficult to find, often commanding a premium well above estimates.
There are currently no new/sealed listings available for 900 Universal Motor Set at this time.