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3801 LEGO Mindstorms Ultimate Accessory Set thumbnail image

3801 LEGO Mindstorms Ultimate Accessory Set
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3801 LEGO Mindstorms Ultimate Accessory Set
  • Ultimate Accessory Set thumbnail
  • Ultimate Accessory Set thumbnail
  • Ultimate Accessory Set thumbnail

LEGO 3801 Ultimate Accessory Set is a Mindstorms set from 2000 valued at $68 for new and sealed sets, up 35% from an original retail price of $49.99. Annual appreciation has averaged 6.65% since release. On the used market, values range from $50 to $64 based on condition.

Set Value (New/Sealed)

This chart represents the current new/sealed value of the set Ultimate Accessory Set since June 2017. Very high accuracy
LEGO 3801 Ultimate Accessory Set is a Mindstorms set released in 2000, containing 45 pieces. Designed as an expansion for the RCX-based Mindstorms system, it includes an RCX Remote Control, rotation and touch sensors, and a LEGO lamp. The assortment also adds Technic liftarms, connectors, and translucent elements for extended building options. A Constructopedia booklet is included with guidance on the new components and building ideas.

A new and sealed Ultimate Accessory Set is currently valued at around $68, with annual growth of 6.7% that is expected to level off to around 1.7% in the coming year. The average used price is $53 for those in good overall condition. Recent market trends show a period of price correction, with values declining over the past year. Based on current trends, this set could be valued near $68 within the next year.
All regions

For Sale (New/Sealed)

 (JP) New condition.Box has been opened, all inner parts are sealed. $50.96
-24.6%
(AU) BrickLink store classic $62.71
-7.2%
(US) Mindstorms ULTIMATE ACCESSORY SET 3801 Building Set 2000 NEW Box Complete
BrickEconomy Choice
$69.99
+3.5%
(US) Amazon listing for Ultimate Accessory Set $70.98
+5.0%
(US) New in sealed box $75.00
+10.9%
(AU) NISB, all seals intact. Boxes have some shelfware. $88.00
+30.2%

Sets in Mindstorms / 1

9719 Robotics Invention System

Theme / Subtheme Mindstorms / 1
Year 1998
Pieces 733
Availability Retired
9719 LEGO Mindstorms Robotics Invention System
Retail $199.99
Value $200.00
Growth  +0.0%

9747 Robotics Invention System

Theme / Subtheme Mindstorms / 1
Year 1999
Pieces 726
Availability Retired
9747 LEGO Mindstorms Robotics Invention System
Retail $199.99
Value $205.23
Growth  +2.6%

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%

3800 Ultimate Builders Set

Theme / Subtheme Mindstorms / 1
Year 2001
Pieces 321
Availability Retired
3800 LEGO Mindstorms Ultimate Builders Set
Retail $59.99
Value $78.13
Growth  +30.2%
Annual growth 2.5%

9736 Exploration Mars

Theme / Subtheme Mindstorms / 1
Year 2000
Pieces 155
Availability Retired
9736 LEGO Mindstorms Exploration Mars
Retail $49.99
Value $75.01
Growth  +50.1%
Annual growth 7.5%

9732 Extreme Creatures

Theme / Subtheme Mindstorms / 1
Year 1998
Pieces 148
Availability Retired
9732 LEGO Mindstorms Extreme Creatures
Retail $49.99
Value $68.73
Growth  +37.5%
Annual growth 1.3%

9731 Vision Command

Theme / Subtheme Mindstorms / 1
Year 2000
Pieces 138
Availability Retired
9731 LEGO Mindstorms Vision Command
Retail $99.99
Value $103.76
Growth  +3.8%

9730 Robo Sports

Theme / Subtheme Mindstorms / 1
Year 1998
Pieces 91
Availability Retired
9730 LEGO Mindstorms Robo Sports
Retail $49.99
Value $51.87
Growth  +3.8%

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 $43.38
Growth  +73.6%
Annual growth 2.1%

9911 Touch Sensor and Leads

Theme / Subtheme Mindstorms / 1
Year 2004
Pieces 3
Availability Retired
9911 LEGO Mindstorms Touch Sensor and Leads
Retail $11.99
Value $20.44
Growth  +70.5%
Annual growth 2.7%

9713 Infrared Transmission Tower

Theme / Subtheme Mindstorms / 1
Year 1998
Pieces 2
Availability Retired
9713 LEGO Mindstorms Infrared Transmission Tower
Retail $24.99
Value $25.00
Growth  +0.0%

9757 Touch Sensor

Theme / Subtheme Mindstorms / 1
Year 1999
Pieces 2
Availability Retired
9757 LEGO Mindstorms Touch Sensor
Retail $10.99
Value $15.30
Growth  +39.2%
Annual growth 1.2%

3805 Robotics Invention System Upgrade Kit

Theme / Subtheme Mindstorms / 1
Year 2001
Pieces 1
Availability Retired
3805 LEGO Mindstorms Robotics Invention System Upgrade Kit
Retail $19.99

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 $120.09
Growth  +9.2%

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 $20.92
Growth  +5.9%

9755 Temperature Sensor

Theme / Subtheme Mindstorms / 1
Year 1999
Pieces 1
Availability Retired
9755 LEGO Mindstorms Temperature Sensor
Retail $23.99
Value $27.03
Growth  +12.7%

9756 Rotation Sensor

Theme / Subtheme Mindstorms / 1
Year 1999
Pieces 1
Availability Retired
9756 LEGO Mindstorms Rotation Sensor
Retail $14.99
Value $16.58
Growth  +10.6%

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%

9889 Temperature Sensor

Theme / Subtheme Mindstorms / 1
Year 2004
Pieces 1
Availability Retired
9889 LEGO Mindstorms Temperature Sensor
Retail $24.99
Value $28.99
Growth  +16.0%
Annual growth 3.7%

My Collection

Ultimate Accessory Set Reviews

29 reviews
4.7
Collectors
Investors
Brickset
“If you like Mindstorms really much, pick this one up. It has a lot of accessories to make the robot of your dreams. There are also controls you can make your robot command to you. This set deserves a 5 out of 5 for a great add-on.”
Full review at brickset.com

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.
Read more
Make your inventions more powerful! The Ultimate Accessory Set™ comes with all you need to make your robotic inventions more powerful, aware, and *capable. The set includes two sensors, a LEGO® Lamp, extra building elements, and a remote control. The Constructopedia explains how to use the new building elements and provides building ideas.
Description provided by LEGO©