1. Sets
  2. Mindstorms
3801 LEGO Mindstorms Ultimate Accessory Set thumbnail image

3801 LEGO Mindstorms Ultimate Accessory Set
Images 3Description 
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 $67 for new and sealed sets, up 33% from an original retail price of $49.99. Annual appreciation has averaged 6.43% 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 2016. 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 $67, with annual growth of 6.4% that is expected to level off to around 1.6% 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 $67 within the next year.
All regions

For Sale (New/Sealed)

 (AU) BrickLink store classic $63.60
-4.7%
(US) Mindstorms ULTIMATE ACCESSORY SET 3801 Building Set 2000 NEW Box Complete
BrickEconomy Choice
$69.99
+4.9%
(US) Amazon listing for Ultimate Accessory Set $70.07
+5.0%
(US) New in sealed box $75.00
+12.4%
(AU) NISB, all seals intact. Boxes have some shelfware. $88.00
+31.9%
All regions

For Sale (Used)

 (US) Used - All parts and instructions. No box. Parts are good. Remote looks clean on the ... $49.49
(HU) Used - Good condition, all parts and instruction present $49.99
(US) Used - Rare Lego Mindstorms 3801 Ultimate Accessory Set with Constructopedia and Box
$54.00
(NL) Used - 100% complete. With instructions 4/5. With box 3/5 and innerbox. Nice conditio... $58.24
(NL) Used - Complete WITH instruction. NO box. NO extra parts $58.90

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 $205.18
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 $171.20
Growth  +14.1%
Annual growth 1.9%

3800 Ultimate Builders Set

Theme / Subtheme Mindstorms / 1
Year 2001
Pieces 321
Availability Retired
3800 LEGO Mindstorms Ultimate Builders Set
Retail $59.99
Value $156.43
Growth  +160.8%
Annual growth 4.7%

9736 Exploration Mars

Theme / Subtheme Mindstorms / 1
Year 2000
Pieces 155
Availability Retired
9736 LEGO Mindstorms Exploration Mars
Retail $49.99
Value $63.41
Growth  +26.8%
Annual growth 7.6%

9732 Extreme Creatures

Theme / Subtheme Mindstorms / 1
Year 1998
Pieces 148
Availability Retired
9732 LEGO Mindstorms Extreme Creatures
Retail $49.99
Value $64.47
Growth  +29.0%

9731 Vision Command

Theme / Subtheme Mindstorms / 1
Year 2000
Pieces 138
Availability Retired
9731 LEGO Mindstorms Vision Command
Retail $99.99
Value $108.41
Growth  +8.4%

9730 Robo Sports

Theme / Subtheme Mindstorms / 1
Year 1998
Pieces 91
Availability Retired
9730 LEGO Mindstorms Robo Sports
Retail $49.99
Value $50.83
Growth  +1.7%

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 $43.13
Growth  +72.6%
Annual growth 2.0%

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 $19.99
Growth  +66.7%
Annual growth 2.6%

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 $15.25
Growth  +38.8%
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
Value $80.49
Growth  +302.7%
Annual growth 5.7%

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 $119.99
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 $27.00
Growth  +12.5%

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%

9889 Temperature Sensor

Theme / Subtheme Mindstorms / 1
Year 2004
Pieces 1
Availability Retired
9889 LEGO Mindstorms Temperature Sensor
Retail $24.99
Value $27.55
Growth  +10.2%
Annual growth 3.6%

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©