Robotics Discovery Set

9735-1·LEGO·1999·109 parts

Used Avg

$127.21

New Avg

$224.15

About Robotics Discovery Set

Robotics Discovery Set (9735-1) is a LEGO LEGO set from 1999 valued at $127.21 on BrickLink. It contains 109 cataloged parts. This set has been retired and is only available on the secondary market.

Seller notes

Sealed copies sell for $224.15 vs $127.21 used, a 76% premium. If you have this set new in sealed box (NISB), price it accordingly.
This is a vintage set (1999). Condition of the box and instructions significantly affects value. A complete set with original box and instructions can sell for well above the average.

Parts (109)

Tile 1 x 4

×4

Wedge, Plate 3 x 3 Cut Corner

×2

Brick 2 x 6

×2

Tile, Modified 1 x 1 with Clip

×4

Brick, Round Corner 4 x 4 Full Brick

×4

Common questions about Robotics Discovery Set

How much is LEGO Robotics Discovery Set (9735-1) worth?

Robotics Discovery Set sells for an average of $127.21 used and $224.15 new/sealed on BrickLink based on 6 months of completed sales. As a retired set, prices tend to hold steady or appreciate over time, especially for complete sets with original packaging. Actual prices vary with completeness. Missing minifigures or key parts will lower the value.

Is LEGO Robotics Discovery Set (9735-1) retired?

Yes, Robotics Discovery Set was released in 1999 and has been retired from retail for several years. Retired LEGO sets are only available on the secondary market through BrickLink, eBay, or other resale platforms. At its current price point, it has appreciated since retirement.

How do I check if my Robotics Discovery Set set is complete?

Use the parts list on this page to check every piece. For the minifigures specifically, you can use the brick'em scanner to identify each figure from a photo and confirm it matches what should be in this set. Missing pieces can be individually sourced on BrickLink.