LEGO 3805 Robotics Invention System Upgrade Kit (2.0)

Released 2002 · 1 pieces · Mindstorms · RCX

LEGO Robotics Invention System Upgrade Kit (2.0) (3805) was released in 2002 in the Mindstorms · RCX line, with 1 pieces. It is one of the smaller Mindstorms sets, larger than only 8% of them. Released in 2002, 24 years ago, well past the two-to-three-year run most LEGO sets get, so it is almost certainly out of production.

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• Estimated value: $9 (modelled from piece count, era, and age, not live market data)

Availability: Likely retired (inferred from its release year, not an official retirement date)

Full details, the price breakdown, and the minifigures included are below. Add it to your collection to track what it's worth.

• 926¢ per piece, pricier per piece than most Mindstorms sets

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Set data from the Rebrickable database, refreshed daily. Catalog data as of 2026-09-01. Values are this site's estimates, see how they're calculated.

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