LEGO 812 Gear Set is a vintage Universal Building Set set from 1974 valued at $50 for new and sealed sets, up 1169% from an original retail price of $3.95. Annual appreciation has averaged 3.79% since release. Used copies are valued between $22 and $38 depending on condition.
LEGO 812-2 Gear Set, also known as Gear Supplementary Set, is a Universal Building Set Gears set released in 1974 with 101 pieces. It is an accessory parts pack centered on early mechanical elements, including black chain links, tires, gears, axles in several lengths, bushings, universal joints, and perforated Technic bricks in multiple colors. The set includes six black Technic link chains with studs for use in moving mechanisms. It also contains milky white axles in 4L, 6L, 8L, and 12L lengths, along with gears with axle holes in 9-, 15-, and 21-tooth versions in red, blue, and yellow.
A new and sealed Gear Set is currently valued at around $50, with annual growth of approximately 3%, which is lower than other Gears sets. The average used price is $25 for those in good overall condition. Based on current trends, this set could be valued near $52 within the next year.