Browse
- Sets
- All Sets
- New Sets
- Recently Retired Sets
- Sets Retiring Soon
- Sets Available Soon
- Set Release Rumors
- Minifigs
- All Minifigs
- New Minifigs
- Recently Retired Minifigs
- Minifigs Retiring Soon
Deals
Analysis
- Sets
- Themes
- Subthemes
- Years
- Most Valuable
- Most Expensive
- Most Owned
- BE 100 Index
- Minifigures
- Most Valuable
- Most Owned
My CollectionSign In or Up

Sets
Mindstorms
Robotics Invention System

9719 LEGO Mindstorms Robotics Invention System

Name: LEGO Mindstorms Robotics Invention System
Brand: LEGO
SKU: 9719-1
Availability: InStock
Rating: 4.60 (9 reviews)

Images 2Description 1

9719 LEGO Mindstorms Robotics Invention System

LEGO 9719 Robotics Invention System is a Mindstorms set from 1998 valued at $200 for new and sealed sets, up 0% from an original retail price of $199.99. Annual appreciation has averaged 0.65% since release. On the used market, values range from $38 to $49 based on condition.

Set Value (New/Sealed)

This chart represents the current new/sealed value of the set Robotics Invention System since May 2018. High accuracy

LEGO 9719 Robotics Invention System is a Mindstorms set in the Robotics Invention System line released in 1998, containing 733 pieces. It centers on the first-generation RCX programmable brick and the 9V Technic components used in early Mindstorms. The set includes three touch sensors and an optical sensor based on the earlier 9V sensor technology. An enclosed CD-ROM provides the software with interactive training missions, programming tools, and building challenges for creating autonomous robots.

A new and sealed Robotics Invention System is currently valued at around $200. The average used price is $40 for those in good overall condition. New and sealed listings currently range from $200 to $389. Based on current trends, this set could be valued near $201 within the next year.

All regions

All regions 5
United States 5

For Sale (New/Sealed)

	(US) BNIB	$199.99 0.0%
	(US) Set is unused, pieces/instructions/cd/box are new.	$200.00
	(US) Amazon listing for Robotics Invention System	$210.00 +5.0%
	(US) Mindstorms Robotics Invention System 9719 1998 Vintage Boxed Set 727 PCS	BrickEconomy Choice $275.00 +37.5%
	(US) MindStorms Robotics Invention Model 3804 New + Lego 9719 +BONUS, Ships Free	$389.00 +94.5%

All regions

All regions 6
United States 6

For Sale (Used)

	(US) Used - Mindstorms Robotics Invention System 9719 Complete	$35.00 --12.5%
	(US) Used - Mindstorms #9719 Robotics Invention System Version 1.0 Software CD & Case	$35.00 --12.5%
	(US) Used - MINDSTORMS 9719 Robotics Invention System 727 pcs Age 12+ (1998)	$40.00
	(US) Used - Mindstorms Robotics Invention System 9719 Manuals Box COMPLETE See Notes	$44.95
	(US) Used - 1998 Lego Mindstorms Robotics Invention System 2.0 Beautiful Condition WOW	$49.95
	(US) Used - Mindstorms Robotics Invention System 2.0 Set 3804 9719 Lot As-Is	$49.99

Sets in Mindstorms / 1


	9747 Robotics Invention System Theme / Subtheme Mindstorms / 1 Year 1999 Pieces 726 Availability Retired Buy this set at eBay Bricklink	Retail $199.99 Value $205.23 Growth +2.6% I own this set I want this set

	9735 Robotics Discovery Set Theme / Subtheme Mindstorms / 1 Year 1999 Pieces 390 Availability Retired Buy this set at eBay	Retail $149.99 Value $172.00 Growth +14.7% Annual growth 2.0% I own this set I want this set

	3800 Ultimate Builders Set Theme / Subtheme Mindstorms / 1 Year 2001 Pieces 321 Availability Retired Buy this set at Amazon eBay	Retail $59.99 Value $78.13 Growth +30.2% Annual growth 2.5% I own this set I want this set

	9736 Exploration Mars Theme / Subtheme Mindstorms / 1 Year 2000 Pieces 155 Availability Retired Buy this set at eBay	Retail $49.99 Value $78.59 Growth +57.2% Annual growth 7.5% I own this set I want this set

	9732 Extreme Creatures Theme / Subtheme Mindstorms / 1 Year 1998 Pieces 148 Availability Retired Buy this set at eBay	Retail $49.99 Value $64.47 Growth +29.0% Annual growth 1.0% I own this set I want this set

	9731 Vision Command Theme / Subtheme Mindstorms / 1 Year 2000 Pieces 138 Availability Retired Buy this set at eBay Bricklink	Retail $99.99 Value $103.76 Growth +3.8% I own this set I want this set

	9730 Robo Sports Theme / Subtheme Mindstorms / 1 Year 1998 Pieces 91 Availability Retired Buy this set at Amazon eBay	Retail $49.99 Value $51.87 Growth +3.8% I own this set I want this set

	3803 Robotics Invention System Upgrade Kit Theme / Subtheme Mindstorms / 1 Year 1999 Pieces 70 Availability Retired Buy this set at eBay Bricklink	Retail $24.99 Value $43.35 Growth +73.5% Annual growth 2.1% I own this set I want this set

	3801 Ultimate Accessory Set Theme / Subtheme Mindstorms / 1 Year 2000 Pieces 45 Availability Retired Buy this set at Amazon eBay	Retail $49.99 Value $67.60 Growth +35.2% Annual growth 6.7% I own this set I want this set

	9911 Touch Sensor and Leads Theme / Subtheme Mindstorms / 1 Year 2004 Pieces 3 Availability Retired Buy this set at eBay Bricklink	Retail $11.99 Value $19.99 Growth +66.7% Annual growth 2.6% I own this set I want this set

	9713 Infrared Transmission Tower Theme / Subtheme Mindstorms / 1 Year 1998 Pieces 2 Availability Retired Buy this set at eBay Bricklink	Retail $24.99 Value $25.00 Growth +0.0% I own this set I want this set

	9757 Touch Sensor Theme / Subtheme Mindstorms / 1 Year 1999 Pieces 2 Availability Retired Buy this set at Bricklink	Retail $10.99 Value $15.29 Growth +39.1% Annual growth 1.2% I own this set I want this set

	3805 Robotics Invention System Upgrade Kit Theme / Subtheme Mindstorms / 1 Year 2001 Pieces 1 Availability Retired Buy this set at eBay Bricklink	Retail $19.99 I own this set I want this set

	9709 RCX Programmable LEGO Brick Theme / Subtheme Mindstorms / 1 Year 1999 Pieces 1 Availability Retired Buy this set at Bricklink	Retail $109.99 Value $120.07 Growth +9.2% I own this set I want this set

	9738 RCX Remote Control Unit Theme / Subtheme Mindstorms / 1 Year 1999 Pieces 1 Availability Retired Buy this set at Bricklink	Retail $19.75 Value $20.92 Growth +5.9% I own this set I want this set

	9755 Temperature Sensor Theme / Subtheme Mindstorms / 1 Year 1999 Pieces 1 Availability Retired Buy this set at eBay Bricklink	Retail $23.99 Value $27.02 Growth +12.6% I own this set I want this set

	9756 Rotation Sensor Theme / Subtheme Mindstorms / 1 Year 1999 Pieces 1 Availability Retired Buy this set at Bricklink	Retail $14.99 Value $16.58 Growth +10.6% I own this set I want this set

	9758 Light Sensor Theme / Subtheme Mindstorms / 1 Year 1999 Pieces 1 Availability Retired Buy this set at eBay Bricklink	Retail $19.75 Value $19.99 Growth +1.2% Annual growth 2.1% I own this set I want this set

	9889 Temperature Sensor Theme / Subtheme Mindstorms / 1 Year 2004 Pieces 1 Availability Retired Buy this set at Bricklink	Retail $24.99 Value $28.99 Growth +16.0% Annual growth 3.7% I own this set I want this set

My Collection

I own this set

I want this set

Set Details

Set number

9719-1

Name

Robotics Invention System

Theme

Mindstorms

Subtheme

Year

1998

Availability

Retired

Pieces

733 (PPP $0.27)

Set Pricing

Retail price

$199.99

New/Sealed

Value

$200.00

Growth

+0.01%

Annual growth

+0.65% Decreasing

90-day change

-6.59%

Used

Value

$40.00

Range

$38.20 - $48.62

Quick Buy

eBay

Buy

Lowest price

$275.00

Highest price

$389.00

Amazon

Buy

Price

$210.00

Bricklink

Buy

Lowest price

$199.99

Highest price

$200.00

*Listings are for new/sealed sets.

Set Predictions

New/Sealed

Today's value

$200.00

1 year forecast

$201.30+0.65%

5 year forecast

$206.52+3.26%

$204

$212

9719 Robotics Invention System is projected to be valued between $204 - $212 within five years.

Insights

Released long ago and now retired, Robotics Invention System 9719 is a first-generation Mindstorms kit built around the RCX brick that draws interest from tech-history and education collectors, and sealed, intact units are scarce and sought after while used examples face obsolescence risk and a narrower buyer base.

Set Facts

The main core of the first generation of Mindstorms sets were the Robotics Invention System sets. These were based around the RCX brick and the 9 V LEGO Technic peripherals available at the time.
It includes three touch-sensors and an optical sensor, using the technology from the earlier 9 V sensors from the pre-Mindstorms sets.

Regional Retail Prices

United States

$199.99

United Kingdom

£159.99

Canada

$229.99

Europe

€179.99

Australia

$279.99

Barcodes

UPC

042884097196

EAN

5702010997190

Robotics Invention System Reviews

9 ratings

4.6

Collectors

Investors

Subtheme Analysis

Mindstorms / 1

Sets

Years

1998 - 2004

Annual growth

+2.06% (this set +0.65%)

This set's annual growth (CAGR) vs. subtheme

Community Stats

Robotics Invention System currently ranks #2 out of the top most owned sets in Mindstorms 1.

#1Robotics Invention System

#2Robotics Invention System

#3Vision Command

#4Ultimate Accessory Set

#5Exploration Mars

#6RCX Programmable LEGO Brick

#7Robotics Discovery Set

#8Extreme Creatures

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.

Build and program your own Lego robots! You can create thousands of robotic inventions. There are interactive training missions and challenges on the enclosed CD-ROM, the Lego Mindstorms website and your own imagination.

Set Pricing Models

BrickEconomy uses a number of methods to determine the value of a set.

New/Sealed

Machine Learning/AI Model

Value (today)

$200.00

Value (in a year)

$201.30

Value (in 2 years)

$202.61

Accuracy

0.960300 Very high

Statistical Model

Value (today)

$231.25

Value (in a year)

(Possible plateau)

Value (in two years)

(Possible plateau)

Accuracy

0.212719 Very low

Used

Machine Learning/AI Model

Value (today)

$40.00

Value (low range)

$38.20

Value (high range)

$48.62

Accuracy

0.905300 High

To learn more about how we calculate pricing and forecasting, check out our article on BrickEconomy’s Approach to LEGO Pricing and Future Value Predictions.

Region · United States (USD)

Theme · Light

Explore

Sets Minifigs Deals

About Us

About BrickEconomy Contact Us Support Us

Helpful Links

FAQs Widgets Sitemap

Follow BrickEconomy

Facebook

Twitter/X

Instagram

LEGO, the LEGO logo, the Minifigure and the brick and knob configurations are trademarks and/or copyrights of the LEGO Group of companies which does not sponsor, authorize or endorse this site.
BrickEconomy, the BrickEconomy logo and all content not covered by The LEGO Group's copyright is, unless otherwise stated, ©2026 BrickEconomy.

Change Region

Changes the pricing currency and date formats to a specific region. Adjusts pricing and date formats to region.