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 $315. 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 between $380 and $393 shortly after it is retired.

For Sale (New/Sealed)

This chart shows the sales listing trends of 51515 Robot Inventor.
(US) Mindstorms Robot Inventor Set 51515 - 100% Verified Authentic and New
BrickEconomy Choice
$286.00
(US) 51515 MINDSTORMS Robot Inventor Building Kit 949pcs *NEW SEALED*
$314.99
-12.5%
(US) MINDSTORMS 51515 Robot Inventor Building Kit 6251945. See Description
$315.00
-12.5%
(CA) Robot Inventor MINDSTORMS (51515)
$323.12
-10.2%
(US) MINDSTORMS 51515 Robot Inventor Building Kit 6251945 STEM Code & Control
$324.88
-9.8%
(CA) Mindstorm Robot Inventor 51515 Building Set 949 PCS New READ
$328.86
-8.6%
(US) MINDSTORMS Robot Inventor Building Set 51515, New, Sealed
$345.99
-3.9%
(US) Offical set 51515 Mindstorms Robot Inventor at LEGO.com
$359.99
(US) LEGO MINDSTORMS Robot Inventor Building Set 51515 (949 Pieces)
$378.37
+5.1%
(US) BrickLink store BIG DEPOT
$394.99
+9.7%
(CA) BrickLink store rapidos2
$399.95
+11.1%
(US) Brand New And Sealed In Box! (Ships in the factory case box, unless you request an a...
$399.99
+11.1%
(DE) MISB
$412.58
+14.6%
(TR) MISB
$415.00
+15.3%
Show 8 more listings

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Year 2020
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Sets in Mindstorms

Theme / Subtheme Mindstorms / 1
Year 1998
Pieces 733
Availability Retired
9719 LEGO Mindstorms Robotics Invention System
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Value $200.00
Growth 0.0%
Annual growth 2.3%
Theme / Subtheme Mindstorms / 1
Year 1999
Pieces 726
Availability Retired
9747 LEGO Mindstorms Robotics Invention System
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Theme / Subtheme Mindstorms / 2
Year 2001
Pieces 717
Availability Retired
3804 LEGO Mindstorms Robotics Invention System V2.0
Retail $199.99
Value $256.43
Growth 28.2%
Annual growth 1.4%
Theme / Subtheme Mindstorms / Star Wars
Year 1999
Pieces 657
Availability Retired
9748 LEGO Mindstorms Star Wars Droid Developer Kit
Retail $99.99
Value $236.25
Growth 136.3%
Annual growth 2.7%
Theme / Subtheme Mindstorms / NXT 2
Year 2009
Pieces 619
Availability Retired
8547 LEGO Mindstorms NXT 2.0
Retail $279.99
Value $369.48
Growth 32.0%
Annual growth 4.8%
Theme / Subtheme Mindstorms / EV3
Year 2013
Pieces 601
Availability Retired
31313 LEGO Mindstorms EV3
Retail $349.99
Value $507.00
Growth 44.9%
Annual growth 19.4%
Theme / Subtheme Mindstorms / Star Wars
Year 2000
Pieces 578
Availability Retired
9754 LEGO Mindstorms Star Wars Dark Side Developer Kit
Retail $99.99
Value $235.64
Growth 135.7%
Annual growth 2.4%
Theme / Subtheme Mindstorms / NXT
Year 2006
Pieces 577
Availability Retired
8527 LEGO Mindstorms NXT
Retail $249.99
Value $448.43
Growth 79.4%
Annual growth 3.2%
Theme / Subtheme Mindstorms / 1
Year 1999
Pieces 390
Availability Retired
9735 LEGO Mindstorms Robotics Discovery Set
Retail $149.99
Value $276.30
Growth 84.2%
Annual growth 2.9%
Theme / Subtheme Mindstorms / 1
Year 2001
Pieces 321
Availability Retired
3800 LEGO Mindstorms Ultimate Builders Set
Retail $59.99
Value $588.34
Growth 880.7%
Annual growth 11.5%
Theme / Subtheme Mindstorms / 1
Year 2000
Pieces 155
Availability Retired
9736 LEGO Mindstorms Exploration Mars
Retail $49.99
Value $134.89
Growth 169.8%
Annual growth 2.7%
Theme / Subtheme Mindstorms / 1
Year 1998
Pieces 148
Availability Retired
9732 LEGO Mindstorms Extreme Creatures
Retail $49.99
Value $57.27
Growth 14.6%
Annual growth 2.0%
Theme / Subtheme Mindstorms / 1
Year 2000
Pieces 138
Availability Retired
9731 LEGO Mindstorms Vision Command
Retail $99.99
Value $117.96
Growth 18.0%
Annual growth 1.2%
Theme / Subtheme Mindstorms / 1
Year 1998
Pieces 91
Availability Retired
9730 LEGO Mindstorms Robo Sports
Retail $49.99
Value $50.00
Growth 0.0%
Annual growth 3.2%
Theme / Subtheme Mindstorms / 1
Year 1999
Pieces 70
Availability Retired
3803 LEGO Mindstorms Robotics Invention System Upgrade Kit
Retail $24.99
Value $28.20
Growth 12.8%
Theme / Subtheme Mindstorms / 1
Year 2000
Pieces 45
Availability Retired
3801 LEGO Mindstorms Ultimate Accessory Set
Retail $49.99
Value $115.36
Growth 130.8%
Annual growth 4.2%
Theme / Subtheme Mindstorms / NXT
Year 2008
Pieces 10
Availability Retired
LEGO Mindstorms NXT Keyfob Transponder
Retail $29.99
Value $41.35
Growth 37.9%
Annual growth 2.6%
Theme / Subtheme Mindstorms / NXT
Year 2006
Pieces 7
Availability Retired
8529 LEGO Connector Cables for Mindstorms NXT
Retail $9.99
Value $19.98
Growth 100.0%
Annual growth 7.9%
Theme / Subtheme Mindstorms / NXT
Year 2006
Pieces 3
Availability Retired
8528 LEGO Converter Cables for Mindstorms NXT
Retail $9.99
Value $46.41
Growth 364.6%
Annual growth 11.7%
Theme / Subtheme Mindstorms / 1
Year 2004
Pieces 3
Availability Retired
9911 LEGO Mindstorms Touch Sensor and Leads
Retail $11.99
Value $17.51
Growth 46.0%
Annual growth 4.0%
Theme / Subtheme Mindstorms / NXT
Year 2008
Pieces 3
Availability Retired
LEGO Mindstorms NXT RF ID Sensor
Retail $29.99
Value $77.83
Growth 159.5%
Annual growth 7.9%
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 $14.72
Growth 33.9%
Annual growth 1.3%
Theme / Subtheme Mindstorms / NXT
Year 2011
Pieces 1
Availability Retired
10285 LEGO Mindstorms NXT Compass Sensor
Retail $54.99
Value $58.07
Growth 5.6%
Annual growth 1.2%
Theme / Subtheme Mindstorms / NXT
Year 2011
Pieces 1
Availability Retired
10286 LEGO Mindstorms NXT Color Sensor
Retail $54.99
Value $51.07
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©