NINJAGO®
Nya vs. Mutation Monster Spinner
from £8.95
£0.18/pc
NINJAGO®
#71839 · EAN 5702017815725
213 pieces · 2 minifigs · Released 2025
£17.99
Cheapest at Hamleys · + £3.99 shipping (£21.98 total) · ✓ In stock
✓ 4 retailers
✓ Prices checked today ·
LEGO® NINJAGO® mech toy playset with 2 minifigures
!
The price is high right now
Close to the 12-month high (£17.99)
213
Pieces
2
Minifigs
2025
Year
≈ £0.08 per piece · 213 pieces
52
Heist
Decent
Trending up
📄 Building instructions (LEGO.com)
📚 Set details: Brickset · Rebrickable
Compare prices
Prices at 4 retailers — last checked today. · How we track these prices.
Retired Sets
○ Out of stock
£15
Hamleys
Best price
● In stock · + £3.99 shipping (£21.98 total)
£17.99
LEGO
Official
● In stock · + £3.95 shipping
£17.99
The Entertainer
○ Out of stock · + £3.99 shipping
£18
Price history — last 90 days
Lowest price across listed retailers.
Lowest price
Specifications
Set #
71839
Theme
NINJAGO®
Pieces
213
Minifigs
2
Year
2025
Status
In production
All-time low
£15
Price per piece
£0.08
EAN
5702017815725
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The best price for Arin's Spinjitzu Battle Mech right now is £17.99 across 4 retailers — matching the official LEGO RRP of .
Measured on price per piece, Arin's Spinjitzu Battle Mech currently sits 13% below the median of the 43 LEGO NINJAGO® sets we track — strong value for the theme.
The 4 retailers are priced almost identically right now (£17.99–£17.99) — with a spread this small, shipping usually decides the best deal.
The lowest daily price has held steady around £17.99 over the past month.
Its all-time low so far is £15.
The current best price is the cheapest this set has been in 2 months.
Frequently asked questions
How much does Arin's Spinjitzu Battle Mech cost?
The cheapest tracked price for Arin's Spinjitzu Battle Mech is £17.99, compared across 4 retailers on Brickheist.
What is the lowest price for Arin's Spinjitzu Battle Mech?
The all-time low we've recorded for Arin's Spinjitzu Battle Mech (set 71839) is £15. The 12-month price history is shown on this page so you can spot a genuine deal.
£17.99
at Hamleys