Forecast Model

This represents the expected annual growth (CAGR) based on a forecast model only.
51515 Robot Inventor is a 949 piece Mindstorms set released in 2020. While the MSRP is $359.99, the current average price on the secondary markets is around $330. The set is estimated to retire sometime within mid 2025. Once retired, the expected annual growth will be close to 2% after the second year, which will value the set bewteen $382 and $397 shortly after it is retired.

For Sale (New/Sealed)

This chart shows the sales listing trends of 51515 Robot Inventor.
(US) MINDSTORMS Robot Inventor 51515
BrickEconomy Choice
$315.00
(US) BRAND NEW LEGO Robot Inventor MINDSTORMS (51515)
$319.95
-11.1%
(US) Robot Inventor MINDSTORMS (51515)
$320.00
-11.1%
(US) Mindstorm Robot Inventor 5 in 1 Set Ages 10+
$335.00
-6.9%
(CA) MINDSTORMS Robot Inventor 51515 - Never Been Used
$335.90
-6.7%
(CA) MINDSTORMS Robot Inventor 51515 - Factory sealed
$336.34
-6.6%
(US) Robot Inventor MINDSTORMS (51515)
$345.00
-4.2%
(US) MINDSTORMS Robot Inventor Building Set 51515, BRAND NEW and MINT
$349.99
-2.8%
(US) 51515 Robot Inventor Set........ *Brand New & Factory Sealed*
$349.99
-2.8%
(US) Mindstorms Robot Inventor (51515) 949 Pieces. Ages 10+
$350.75
-2.6%
(US) MINDSTORMS Robot Inventor Building Set 51515; STEM Model Robot Toy for Creative Kids ...
$359.95
0.0%
(US) #51515 Robot Inventor Mindstorms NEW Factory Sealed!
$359.95
0.0%
(US) MINDSTORMS - Robot Inventor 51515 [New Toy] Brick
$359.95
0.0%
(US) MINDSTORMS Robot Inventor 5-in-1 Building Set (51515), NEW FACTORY SEALED
$359.95
0.0%
(US) Offical set 51515 Mindstorms Robot Inventor at LEGO.com
$359.99
(US) Robot Inventor MINDSTORMS (51515)
$359.99
(US) MINDSTORMS Robot Inventor 51515
$359.99
Show 16 more listings

Related Sets

Year 2020
Pieces 366
Availability Retired
40413 LEGO Mindstorms Mini Robots
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Value $10.17
Annual growth 37.2%

Sets in Mindstorms

Theme / Subtheme Mindstorms / 1
Year 1998
Pieces 733
Availability Retired
9719 LEGO Mindstorms Robotics Invention System
Retail $199.99
Value $360.48
Growth 80.2%
Annual growth 2.6%
Theme / Subtheme Mindstorms / 1
Year 1999
Pieces 726
Availability Retired
9747 LEGO Mindstorms Robotics Invention System
Retail $199.99
Value $215.33
Growth 7.7%
Theme / Subtheme Mindstorms / 2
Year 2001
Pieces 717
Availability Retired
3804 LEGO Mindstorms Robotics Invention System V2.0
Retail $199.99
Value $399.99
Growth 100.0%
Annual growth 3.5%
Theme / Subtheme Mindstorms / Star Wars
Year 1999
Pieces 657
Availability Retired
9748 LEGO Mindstorms Star Wars Droid Developer Kit
Retail $99.99
Value $249.83
Growth 149.9%
Annual growth 4.3%
Theme / Subtheme Mindstorms / NXT 2
Year 2009
Pieces 619
Availability Retired
8547 LEGO Mindstorms NXT 2.0
Retail $279.99
Value $383.97
Growth 37.1%
Annual growth 7.0%
Theme / Subtheme Mindstorms / EV3
Year 2013
Pieces 601
Availability Retired
31313 LEGO Mindstorms EV3
Retail $349.99
Value $396.99
Growth 13.4%
Annual growth 3.1%
Theme / Subtheme Mindstorms / Star Wars
Year 2000
Pieces 578
Availability Retired
9754 LEGO Mindstorms Star Wars Dark Side Developer Kit
Retail $99.99
Value $271.49
Growth 171.5%
Annual growth 5.5%
Theme / Subtheme Mindstorms / NXT
Year 2006
Pieces 577
Availability Retired
8527 LEGO Mindstorms NXT
Retail $249.99
Value $494.99
Growth 98.0%
Annual growth 3.0%
Theme / Subtheme Mindstorms / 1
Year 1999
Pieces 390
Availability Retired
9735 LEGO Mindstorms Robotics Discovery Set
Retail $149.99
Value $199.95
Growth 33.3%
Annual growth 3.7%
Theme / Subtheme Mindstorms / 1
Year 2001
Pieces 321
Availability Retired
3800 LEGO Mindstorms Ultimate Builders Set
Retail $59.99
Value $528.23
Growth 780.5%
Annual growth 11.5%
Theme / Subtheme Mindstorms / 1
Year 2000
Pieces 155
Availability Retired
9736 LEGO Mindstorms Exploration Mars
Retail $49.99
Value $179.99
Growth 260.1%
Annual growth 5.6%
Theme / Subtheme Mindstorms / 1
Year 1998
Pieces 148
Availability Retired
9732 LEGO Mindstorms Extreme Creatures
Retail $49.99
Value $49.90
Theme / Subtheme Mindstorms / 1
Year 2000
Pieces 138
Availability Retired
9731 LEGO Mindstorms Vision Command
Retail $99.99
Value $130.93
Growth 30.9%
Annual growth 1.3%
Theme / Subtheme Mindstorms / 1
Year 1998
Pieces 91
Availability Retired
9730 LEGO Mindstorms Robo Sports
Retail $49.99
Value $53.80
Growth 7.6%
Annual growth 2.4%
Theme / Subtheme Mindstorms / 1
Year 1999
Pieces 70
Availability Retired
3803 LEGO Mindstorms Robotics Invention System Upgrade Kit
Retail $24.99
Value $28.04
Growth 12.2%
Theme / Subtheme Mindstorms / 1
Year 2000
Pieces 45
Availability Retired
3801 LEGO Mindstorms Ultimate Accessory Set
Retail $49.99
Value $100.21
Growth 100.5%
Annual growth 3.5%
Theme / Subtheme Mindstorms / NXT
Year 2008
Pieces 10
Availability Retired
LEGO Mindstorms NXT Keyfob Transponder
Retail $29.99
Value $40.91
Growth 36.4%
Annual growth 2.8%
Theme / Subtheme Mindstorms / NXT
Year 2006
Pieces 7
Availability Retired
8529 LEGO Connector Cables for Mindstorms NXT
Retail $9.99
Value $15.98
Growth 60.0%
Annual growth 8.0%
Theme / Subtheme Mindstorms / NXT
Year 2006
Pieces 3
Availability Retired
8528 LEGO Converter Cables for Mindstorms NXT
Retail $9.99
Value $70.82
Growth 608.9%
Annual growth 18.3%
Theme / Subtheme Mindstorms / 1
Year 2004
Pieces 3
Availability Retired
9911 LEGO Mindstorms Touch Sensor and Leads
Retail $11.99
Value $21.90
Growth 82.7%
Annual growth 3.4%
Theme / Subtheme Mindstorms / NXT
Year 2008
Pieces 3
Availability Retired
LEGO Mindstorms NXT RF ID Sensor
Retail $29.99
Value $75.13
Growth 150.5%
Annual growth 8.4%
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%
Theme / Subtheme Mindstorms / 1
Year 1999
Pieces 2
Availability Retired
9757 LEGO Mindstorms Touch Sensor
Retail $10.99
Value $15.15
Growth 37.9%
Annual growth 1.5%
Theme / Subtheme Mindstorms / NXT
Year 2011
Pieces 1
Availability Retired
10285 LEGO Mindstorms NXT Compass Sensor
Retail $54.99
Value $57.70
Growth 4.9%
Annual growth 1.8%
Theme / Subtheme Mindstorms / NXT
Year 2011
Pieces 1
Availability Retired
10286 LEGO Mindstorms NXT Color Sensor
Retail $54.99
Value $49.99
Theme / Subtheme Mindstorms / NXT
Year 2009
Pieces 1
Availability Retired
10287 LEGO Mindstorms Intelligent NXT Black Brick
Retail $169.99
Theme / Subtheme Mindstorms / NXT
Year 2011
Pieces 1
Availability Retired
2852724 LEGO Mindstorms NXT Accelerometer Sensor
Retail $54.99
Value $49.00
Theme / Subtheme Mindstorms / NXT
Year 2011
Pieces 1
Availability Retired
2852725 LEGO Mindstorms NXT Infrared Seeker
Retail $49.99
Value $59.64
Growth 19.3%
Annual growth 3.9%
Theme / Subtheme Mindstorms / NXT
Year 2011
Pieces 1
Availability Retired
2852726 LEGO Mindstorms NXT Gyroscopic Sensor
Retail $54.99
Value $67.25
Growth 22.3%
Annual growth 2.7%
Theme / Subtheme Mindstorms / NXT
Year 2011
Pieces 1
Availability Retired
2853216 LEGO Mindstorms NXT Infrared Link Sensor
Retail $54.99
Value $72.95
Growth 32.7%
Annual growth 5.3%
Theme / Subtheme Mindstorms / NXT
Year 2010
Pieces 1
Availability Retired
2855040 LEGO Mindstorms NXT IR Receiver
Retail $49.99
Value $70.40
Growth 40.8%
Annual growth 5.4%
Theme / Subtheme Mindstorms / 1
Year 2001
Pieces 1
Availability Retired
3805 LEGO Mindstorms Robotics Invention System Upgrade Kit
Retail $19.99
Value $71.13
Growth 255.8%
Annual growth 6.6%
Theme / Subtheme Mindstorms / NXT
Year 2007
Pieces 1
Availability Retired
4524081 LEGO Mindstorms NXT CD
Retail $19.99
Value $25.14
Growth 25.8%
Annual growth 1.9%
Theme / Subtheme Mindstorms / EV3
Year 2013
Pieces 1
Availability Exclusive
45500 LEGO Mindstorms EV3 Intelligent Brick
Retail $189.99
Available at retail
Theme / Subtheme Mindstorms / EV3
Year 2013
Pieces 1
Availability Retired
45502 LEGO Mindstorms EV3 Large Servo Motor
Retail $24.99
Value $39.95
Growth 59.9%
Annual growth 25.0%
Theme / Subtheme Mindstorms / EV3
Year 2013
Pieces 1
Availability Retired
45503 LEGO Mindstorms EV3 Medium Servo Motor
Retail $19.99
Value $36.88
Growth 84.5%
Annual growth 5.7%
Theme / Subtheme Mindstorms / EV3
Year 2013
Pieces 1
Availability Retired
45504 LEGO Mindstorms EV3 Ultrasonic Sensor
Retail $29.99
Value $44.43
Growth 48.1%
Annual growth 13.4%
Theme / Subtheme Mindstorms / EV3
Year 2013
Pieces 1
Availability Retired
45505 LEGO Mindstorms EV3 Gyro Sensor
Retail $29.99
Value $55.00
Growth 83.4%
Annual growth 5.5%
Theme / Subtheme Mindstorms / EV3
Year 2013
Pieces 1
Availability Retail
45506 LEGO Mindstorms EV3 Color Sensor
Retail $39.99
Available at retail
Theme / Subtheme Mindstorms / EV3
Year 2013
Pieces 1
Availability Retail
45507 LEGO Mindstorms EV3 Touch Sensor
Retail $19.99
Available at retail
Theme / Subtheme Mindstorms / EV3
Year 2013
Pieces 1
Availability Retired
45508 LEGO Mindstorms EV3 Infrared Beacon
Retail $29.99
Value $43.01
Growth 43.4%
Annual growth 5.1%
Theme / Subtheme Mindstorms / EV3
Year 2013
Pieces 1
Availability Retired
45509 LEGO Mindstorms EV3 Infrared Sensor
Retail $29.99
Value $44.96
Growth 49.9%
Annual growth 3.9%
Year 2015
Pieces 1
Availability Retired
45517 LEGO Mindstorms Transformer 10V DC
Retail $29.99
Value $29.95
Theme / Subtheme Mindstorms / 1
Year 1999
Pieces 1
Availability Retired
9709 Mindstorms RCX Programmable LEGO Brick
Retail $109.99
Value $117.97
Growth 7.3%
Theme / Subtheme Mindstorms / 1
Year 1999
Pieces 1
Availability Retired
9738 LEGO Mindstorms RCX Remote Control Unit
Retail $19.75
Value $70.99
Growth 259.4%
Annual growth 6.0%
Theme / Subtheme Mindstorms / NXT
Year 2009
Pieces 1
Availability Retired
9749 LEGO Mindstorms NXT Temperature Sensor
Retail $39.95
Value $41.92
Growth 4.9%
Annual growth 5.5%
Theme / Subtheme Mindstorms / 1
Year 1999
Pieces 1
Availability Retired
9755 LEGO Mindstorms Temperature Sensor
Retail $23.99
Value $25.95
Growth 8.2%
Theme / Subtheme Mindstorms / 1
Year 1999
Pieces 1
Availability Retired
9756 LEGO Mindstorms Rotation Sensor
Retail $14.99
Value $15.56
Growth 3.8%
Theme / Subtheme Mindstorms / 1
Year 1999
Pieces 1
Availability Retired
9758 LEGO Mindstorms Light Sensor
Retail $19.75
Value $27.78
Growth 40.7%
Annual growth 1.6%
Theme / Subtheme Mindstorms / NXT
Year 2006
Pieces 1
Availability Retired
9798 LEGO Mindstorms NXT Rechargeable Battery
Retail $54.99
Value $61.18
Growth 11.3%
Annual growth 1.0%
Enter the amazing physical and digital world of programmable, remote-control robots and intelligent creations. With LEGO® MINDSTORMS® Robot Inventor (51515), young robot fans build 5 unique, motorized robots and vehicles using the free LEGO MINDSTORMS Robot Inventor App. Then they bring them to life, one at a time, using the drag-and-drop coding environment based on Scratch and complete fun activities and challenging missions (visit LEGO.com/devicecheck for a list of compatible devices). And with almost 1,000 pieces, kids will love to come up with their own tech toy creations and share them with other robot fans on LEGO Life.

Level up the play experience
From the intelligent Hub with its 5x5 LED screen, 6-axis gyro and speaker, to powerful motors and accurate sensors, the latest evolution of LEGO MINDSTORMS coding robots for kids is the perfect way to help youngsters express and develop their creativity, while gaining essential 21st century STEM skills.
Description provided by LEGO©