Ninja Boy

Steam Siege · 103/114 ·Uncommon

Illustration: Megumi Mizutani → All League Promo cards →

League Promo £3.66 4 sales Normal £1.60 13 sales

Market price

£3.79

Price history · RAW

2026-05-23 · £1.25 £5.29 · 2026-07-24

How is this value calculated?

Ladder estimate · English · ~£1.46 gruen reverse_holo

Evidence path	Sales	Age	Value vᵢ	Weight gᵢ
eigene rohe NM-Verkäufe	5	4 mo	£1.73	40.82
eigene LP-Verkäufe ÷ 0.9306	3	3 mo	£0.44	5.55

value = exp( Σ gᵢ·ln vᵢ ⁄ Σ gᵢ ) = £1.46 · Σ g = 46.37

Measured error for this era×language (backtest): ±19 %

PSA Population

No PSA numbers for this print yet — in any language.

Recent sales · 4

2026-07-24	EN	RAW NM	Ninja Boy 103/114 League Stamped Promo Reverse Holo Steam Si · eBay	£3.56
2026-06-30	EN	RAW UNKNOWN	Ninja Boy 103/114 XY - Steam Siege Reverse Holo Pokemon Leag · eBay	£4.42
2026-06-15	EN	RAW UNKNOWN	XY Steam Siege Ninja Boy 103/114 Reverse Holo EN League Cup · eBay	£1.25
2026-05-23	ES	RAW LP	Ninja Boy 103/114, 2016 Copa de la Liga Promo Estampado Reve · eBay	£5.29

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FAQ

Frequently asked questions

How does lastsold determine the market value?

lastsold uses only real sales — eBay plus auction houses like Goldin & Fanatics — recent sales count more (recency weighting), outliers and fakes are removed. It's not an estimate but actual sold prices, separated by condition, language and grading.