Set Value (New/Sealed)

This chart represents the current new/sealed value of the set Heavy Duty Excavator since November 2022. Very high accuracy
LEGO 42121 Heavy Duty Excavator was a 569 piece Technic set released in 2021. It was retired in November 2022 with a lifespan of 20 months. The current value for a new and sealed Heavy Duty Excavator is estimated around $87 today with current average yearly gain of about 20% but will level off in the next year closer to a 9% annual growth. On the secondary markets, the typical price range for the set MISB/NISB is between $73 and $120. The current used prices for Heavy Duty Excavator can be found in the range of $43 and $66 depending on the set's condition, with an average price of $55 if it is in good overall condition.

For Sale (New/Sealed)

(US) TECHNIC: Heavy-Duty Excavator (42121)
BrickEconomy Choice
$66.99
(CA) BrickLink store Brick St-Jerome
$73.87
-15.2%
(US) TECHNIC Heavy-Duty Excavator 42121 Construction Retired Brand New Sealed
$74.99
-13.9%
(US) TECHNIC: Heavy-Duty Excavator (42121) Read Description
$80.00
-8.2%
(KR) TECHNIC 42121 2in1 HEAVY-DUTY EXCAVATOR NEW BUILDING TOY SEALED
$85.99
-1.3%
(NL) BrickLink store piernl-groningen
$91.06
+4.5%
(US) Amazon listing for Heavy Duty Excavator
~$91.49
+5.0%
(US) BrickLink store Daddy Daughter Bricks
$95.00
+9.0%
(US) Technic Heavy-Duty Excavator 42121 Toy Building Kit Playset 569pcs New
$95.79
+9.9%
(AU) Technic - Heavy Duty Excavator (or Tracked Tractor) 2-in-1 #42121 BNIB
$97.26
+11.6%
(AU) New and Sealed
$97.31
+11.7%
(US) NEW SEALED Lego 42121 Technic Heavy Duty Excavator Retired Set
$99.00
+13.6%
(CA) BrickLink store rapidos2
$99.95
+14.7%
(US) LEGO TECHNIC 42121 Heavy Duty Excavator Retired BRAND NEW FACTORY SEALED!
$99.99
+14.8%
Show 25 more listings

Sales Distribution (Last 90 Days)

This chart shows the distribution of sales for the last 3 months of new/sealed 42121 Heavy Duty Excavator.

Sale Trends

This chart shows the sales trends (number sold) of new/sealed 42121 Heavy Duty Excavator.

Technic Excavator Sets

Theme Technic
Year 2016
Pieces 3,927
Availability Retired
42055 LEGO Technic Bucket Wheel Excavator
Retail $279.99
Value $481.60
Growth  72.0%
Annual growth 5.4%
Theme Technic
Year 2013
Pieces 720
Availability Retired
42006 LEGO Technic Excavator
Retail $79.99
Value $184.98
Growth  131.3%
Annual growth 6.4%
Theme Technic
Year 2010
Pieces 1,123
Availability Retired
8043 LEGO Technic Motorized Excavator
Retail $199.99
Value $664.77
Growth  232.4%
Annual growth 7.2%
Theme Technic
Year 2010
Pieces 252
Availability Retired
8047 LEGO Technic Compact Excavator
Retail $24.99
Value $75.73
Growth  203.0%
Annual growth 8.7%
Theme Technic
Year 2008
Pieces 720
Availability Retired
8294 LEGO Technic Excavator
Retail $59.99
Value $191.00
Growth  218.4%
Annual growth 5.2%
Theme Technic
Year 2005
Pieces 286
Availability Retired
8419 LEGO Technic Excavator
Retail $19.99
Value $91.07
Growth  355.6%
Annual growth 6.4%
Theme Technic
Year 1992
Pieces 257
Availability Retired
8837 LEGO Technic Pneumatic Excavator
Retail $47.00
Value $196.79
Growth  318.7%
Annual growth 5.4%
Theme Technic
Year 1988
Pieces 326
Availability Retired
8853 LEGO Technic Excavator
Retail $32.00
Value $232.58
Growth  626.8%
Annual growth 3.6%
Theme Technic
Year 1984
Pieces 347
Availability Retired
8851 LEGO Technic Excavator
Retail $46.00
Value $558.88
Growth  1115.0%
Annual growth 6.4%

Sets in Technic

Theme Technic
Year 2021
Pieces 3,854
Availability Retired
42131 LEGO Technic Cat D11 Bulldozer
Retail $499.99
Value $526.14
Growth  5.2%
Annual growth 16.6%
Theme Technic
Year 2021
Pieces 2,017
Availability Retail
42128 LEGO Technic Heavy-Duty Tow Truck
Retail $159.99
Available at retail
Theme Technic
Year 2021
Pieces 1,379
Availability Retired
42126 LEGO Technic Ford F-150 Raptor
Retail $99.99
Value $129.57
Growth  29.6%
Annual growth 23.5%
Theme Technic
Year 2021
Pieces 665
Availability Retail
42122 LEGO Technic Jeep Wrangler
Retail $49.99
Available at retail
Theme Technic
Year 2021
Pieces 457
Availability Retired
42120 LEGO Technic Rescue Hovercraft
Retail $29.99
Value $40.42
Growth  34.8%
Annual growth 13.6%
Theme Technic
Year 2021
Pieces 374
Availability Retired
42124 LEGO Technic Off-Road Buggy
Retail $129.99
Value $155.37
Growth  19.5%
Annual growth 9.4%
Theme Technic
Year 2021
Pieces 145
Availability Retail
42117 LEGO Technic Race Plane
Retail $9.99
Available at retail
Theme Technic
Year 2021
Pieces 140
Availability Retired
42116 LEGO Technic Skid Steer Loader
Retail $9.99
Value $11.19
Growth  12.0%
Annual growth 4.2%
Theme Technic
Year 2021
Pieces 70
Availability Retired
30465 LEGO Technic Helicopter
Retail $4.99
Value $6.52
Growth  30.7%
Annual growth 9.3%
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Looking for a special gift for kids who love construction toy sets? This 2-in-1 LEGO® Technic™ Heavy-Duty Excavator (42121) toy has plenty of features for hours of creative play. Boys and girls aged 8 and up will enjoy an immersive building challenge before exploring the digger toy's realistic features.

See how an excavator works
Digging, driving, rotating; there's so much to discover in this cool kids' excavator toy. Check out the shovel that moves up and down, plus the movable arm, running belts and rotating body. There’s also a detailed cabin with a driver’s seat and control panel. The set comes with extra LEGO brick ‘stones’ to dig and 4 cones. When it’s time for a new challenge, the model rebuilds into a tracked tractor with backhoe.

Packed with realistic features, this digger toy set lets kids see how construction vehicles really work. Check out the moving shovel and arm, plus running belts, just like on a real excavator.

When kids are ready for a new challenge, the...
Description provided by LEGO©