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Lowest price: - Retailers: 0

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Retailer prices for 42121 are sorted by the latest lowest price.

Retailer prices
No retailer prices are available for this LEGO set yet.

Price history 42121

Full price history at a glance.

We check Dutch retailers every day. This graph shows the full daily-low price series we have for this set.

Lowest yet
€124,10
24 Dec 2025 · Bol.com
Peak price
€150,00
31 Dec 2025 · Bol.com
Average
€143,31
258% above RRP
RRP
€39,99
reference price

Daily lowest price tracked across 2 Dutch retailers. The dotted line marks LEGO's recommended retail price.

Source: daily measurement at 2 Dutch retailers, 15 Dec 2025 – 16 May 2026. RRP via LEGO.com.

Last 12 price points for LEGO 42121 Heavy-Duty Excavator
Date Price Retailer Stock
€139,99 Steentjesplein In stock
€139,99 Steentjesplein In stock
€139,99 Steentjesplein In stock
€139,99 Steentjesplein In stock
€139,99 Steentjesplein In stock
€147,95 Bol.com In stock
€147,95 Bol.com In stock
€147,95 Bol.com In stock
€147,95 Bol.com In stock
€147,95 Bol.com In stock
€147,95 Bol.com In stock
€147,95 Bol.com In stock
- BricksDeal Forecast Beta

Price will likely move slightly.

Calibrated forecast based on historical pricing, seasonal patterns and retailer behavior. Tuned conservatively: rather cautious than optimistic.

Drop likelihood Next 60 days
50%
Medium · ±6%

Signal is mixed. Small movements are more likely than a big drop.

Expected low - within 60 days
Vs. today - -
Buy now anyway

Projected price path

Actual price Predicted path 80% interval
60-day window Model v1 · 53 historic points
Price position +++
Still has room
We compare current price against RRP and lowest tracked price.
Retailer pressure ++
0 retailers compared
More retailers usually means more competition on the lowest price.
Stock +
0 in stock
Availability lowers the chance of a scarcity premium.
History base
53 points
The v1 migration uses this as a transparent baseline.
Based on 53 price points · 0 retailers · transparent baseline How this model works

About this set

What to know about LEGO 42121 before you buy.

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. A rewarding build for young LEGO fans The LEGO Technic universe offers advanced building toys for LEGO fans ready for their next challenge. With realistic mechanisms, these rewarding sets are a great way to introduce kids to the world of engineering. Whether it’s a birthday, Christmas, or ‘just because’ gift, young construction fans will love building and exploring this 2-in-1 LEGO® Technic™ Heavy-Duty Excavator (42121) toy set. 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 2-in-1 toy model rebuilds into a tracked tractor with backhoe. This cool excavator toy for kids is ideal for boys and girls aged 8 and up who love construction vehicles. With the authentic cabin and control panel to explore, it’s easy for kids to imagine life on a construction site with this cool excavator toy. Role-play is easy with this cool set. There are 4 cones to manage the building site, plus extra LEGO® pieces to use as bricks for scooping up with the digger truck toy. This kids' excavator toy model measures over 9 in. (23 cm) high, with arm up,14.5 in. (37 cm) long, with arm fully extended, and 4 in. (11 cm) wide. The LEGO® Technic™ universe opens up the world of engineering for young LEGO fans ready for their next building challenge. LEGO® components meet stringent industry standards to ensure they are consistent, compatible and connect reliably every time – it’s been that way since 1958. LEGO® components are dropped, heated, crushed, twisted and analyzed to make sure they meet strict global safety standards.

Frequently asked questions

Quick answers about price, stock and set data.

What is the lowest price for Heavy-Duty Excavator?
There is no current price available right now.
Has LEGO 42121 ever been cheaper?
The lowest historical price was €124,10 on 24 Dec 2025 at Bol.com.
How many pieces does LEGO 42121 have?
This set has 569 pieces.
What year is this set from?
LEGO 42121 was released in 2021.
What is the RRP for LEGO 42121?
LEGO's recommended retail price is €39,99.
What is the recommended age for LEGO 42121?
LEGO recommends ages 8+ for this set.
Is LEGO 42121 still available?
This set is not in stock at any of the retailers we track right now. Set a price alert to hear when it returns.
Which retailers do you compare?
When retailers offer this set, prices will appear here.
How often do you update prices?
We check prices multiple times per day at every tracked retailer and publish the most recent value on this page.