Forecast Model

This represents the expected annual growth (CAGR) based on a forecast model only.
LEGO 42121 Heavy Duty Excavator is a 569 piece Technic set released in 2021. The current retail price is $39.99, however, the average sales listings on the secondary markets is closer to $42. The set is estimated to retire sometime within mid 2023. Once retired, the expected annual growth will be close to 4% after the second year, which will value the set between $47 and $49 shortly after it is retired.
Retirement risk Retirement risk. Heavy Duty Excavator has a current lifespan of 21 months, based on the average lifespan of other sets in this theme, which is 19 months, this set is at risk for retiring in the coming months.

For Sale (New/Sealed)

This chart shows the sales listing trends of 42121 Heavy Duty Excavator.
(US) Technic Heavy Duty Excavator (42121) Toy Building Kit, New 2021, 569 Pieces
BrickEconomy Choice
$31.99
(RO) BrickLink store LL Store
$34.44
-13.9%
(NO) BrickLink store BrickShop Norway
$37.04
-7.4%
(SI) Brand NEW! MISB. Box is in perfect condition.
$39.90
-0.2%
(US) TECHNIC (42121) Heavy Duty Excavator Factory Sealed
$39.99
(US) Technic Heavy-Duty Excavator 42121
$39.99
(US) Offical set 42121 Technic Heavy Duty Excavator at LEGO.com
$39.99
(US) Amazon listing for Heavy Duty Excavator
~$39.99
(AU) BrickLink store D*N*T*B*R*I*C*K*S
$40.19
+0.5%
(AU) Technic Heavy Duty Excavator 42121 2 In 1 Model New
$40.79
+2.0%
(CA) BrickLink store Brick St-Jerome
$40.94
+2.4%
(NL) New in box, Sealed. Photos can be made on request for Box Collectors (Serious Buyers ...
$41.59
+4.0%
(FR) 42121 LEGO TECHNIC - HEAVY DUTY EXCAVATOR
$41.95
+4.9%
(US) 6328597 Technic Heavy-Duty Excavator 42121
$42.18
+5.5%
Show 28 more listings

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Growth 2.0%
Annual growth 2.0%
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©