Kai's Source Dragon Battle
LEGO 71815 · Ninjago · retail $37.99
Recently retired · Aug 2025
LEGO 71818 Tournament Battle Arena
set number 71818 · Ninjago · released 2024 · retail $49.99
Recently retired · Nov 2025
Brickset lists LEGO 71818 Tournament Battle Arena as recently retired (Nov 2025). 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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