Kai's Source Dragon Battle
LEGO 71815 · Ninjago · retail $37.99
Recently retired · Aug 2025
LEGO 71804 Arin's Battle Mech
set number 71804 · Ninjago · released 2024 · retail $15.99
Recently retired · Jan 2026
Brickset lists LEGO 71804 Arin's Battle Mech as recently retired (Jan 2026). Not enough verified complete-set listings to calculate a dependable current estimate. Prices below are calculated market estimates from active listings, not completed sales.
Complete-set valuation
Not enough verified complete-set listings to calculate a dependable current estimate. We only price complete sets, so parts, instruction manuals, minifigures and accessory listings never count toward these figures.
Figures are typical asking prices from active listing data, not completed sales.
Checked 2026-07-30 · lifecycle data from Brickset. Based on Brickset ownership data + live eBay supply — LEGO does not publish production figures.
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