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9747 LEGO Mindstorms Robotics Invention System thumbnail image

9747 LEGO Mindstorms Robotics Invention System
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9747 LEGO Mindstorms Robotics Invention System
  • Robotics Invention System thumbnail
  • Robotics Invention System thumbnail
  • Robotics Invention System thumbnail
  • Robotics Invention System thumbnail
  • Robotics Invention System thumbnail

LEGO 9747 Robotics Invention System is a Mindstorms set from 1999 valued at $205 for new and sealed sets, up 3% from an original retail price of $199.99. Annual appreciation has averaged 0.10% since release. Used copies are valued between $99 and $124 depending on condition.

Set Value (New/Sealed)

This chart represents the current new/sealed value of the set Robotics Invention System since November 2019. High accuracy
LEGO 9747 Robotics Invention System is a Mindstorms set released in 1999, containing 726 pieces. It centers on the RCX microcomputer, which receives input from included sensors and controls the kit’s electric motors and mechanisms such as gears. Programs are created using RCX Code and transferred to the RCX via an infrared link. The set includes step-by-step building guides and software to support robot construction and programming.

A new and sealed Robotics Invention System is currently valued at around $205. The average used price is $103 for those in good overall condition. Based on current trends, this set could be valued near $205 within the next year.

For Sale (New/Sealed)

There are currently no new/sealed listings available for 9747 Robotics Invention System at this time.
All regions

For Sale (Used)

 (US) Used - 9747 MINDSTORMS ROBOTICS INVENTION SYSTEM 1.5. 100% Complete + EXTRAS
$95.00
--8.1%
(US) Used - MINDSTORMS: Robotics Invention System 1.5 (9747) x2 boxes
$100.00
--3.2%
(US) Used - NEW OPEN BOX Lego Mindstorms RCX 9747 Robotics Invention System, Version 1.5
$100.00
--3.2%
(US) Used - (9747) Mindstorms Robotics Invention System 1.5
$112.50

Sets in Mindstorms / 1

9735 Robotics Discovery Set

Theme / Subtheme Mindstorms / 1
Year 1999
Pieces 390
Availability Retired
9735 LEGO Mindstorms Robotics Discovery Set
Retail $149.99
Value $172.00
Growth  +14.7%
Annual growth 2.0%

3803 Robotics Invention System Upgrade Kit

Theme / Subtheme Mindstorms / 1
Year 1999
Pieces 70
Availability Retired
3803 LEGO Mindstorms Robotics Invention System Upgrade Kit
Retail $24.99
Value $43.21
Growth  +72.9%
Annual growth 2.0%

9757 Touch Sensor

Theme / Subtheme Mindstorms / 1
Year 1999
Pieces 2
Availability Retired
9757 LEGO Mindstorms Touch Sensor
Retail $10.99
Value $15.26
Growth  +38.9%
Annual growth 1.2%

9709 RCX Programmable LEGO Brick

Theme / Subtheme Mindstorms / 1
Year 1999
Pieces 1
Availability Retired
9709 Mindstorms RCX Programmable LEGO Brick
Retail $109.99
Value $120.02
Growth  +9.1%

9738 RCX Remote Control Unit

Theme / Subtheme Mindstorms / 1
Year 1999
Pieces 1
Availability Retired
9738 LEGO Mindstorms RCX Remote Control Unit
Retail $19.75
Value $20.90
Growth  +5.8%

9755 Temperature Sensor

Theme / Subtheme Mindstorms / 1
Year 1999
Pieces 1
Availability Retired
9755 LEGO Mindstorms Temperature Sensor
Retail $23.99
Value $27.01
Growth  +12.6%

9756 Rotation Sensor

Theme / Subtheme Mindstorms / 1
Year 1999
Pieces 1
Availability Retired
9756 LEGO Mindstorms Rotation Sensor
Retail $14.99
Value $16.57
Growth  +10.5%

9758 Light Sensor

Theme / Subtheme Mindstorms / 1
Year 1999
Pieces 1
Availability Retired
9758 LEGO Mindstorms Light Sensor
Retail $19.75
Value $19.99
Growth  +1.2%
Annual growth 2.1%

My Collection

Robotics Invention System Reviews

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About Mindstorms 1

This was the first generation of the LEGO Mindstorms platform also known as the original Robotics Invention System.

1 consists of 20 sets that ran from 1998 to 2004. As of today, 9747 Robotics Invention System is the most valuable 1 set with an estimated new/factory sealed value of $205.
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