Rillaboom

SWSH Black Star Promos · SWSH006/307

Illustration: Kouki Saitou →

Staff Stamp £82.51 6 sales Normal £5.13 21 sales

Market price

£5.13

Price history · RAW

2026-05-09 · £1.99 £16.68 · 2026-09-04

Cross-market · RAW median per marketplace

Spread vs. cheapest market — before shipping/duty/fees

ebay.co.uk	n=2	£12.77	+198%
ebay.com	n=2	£4.29	—

Price per print

🇬🇧 Normal · EN n=4 £5.13

🇮🇹 Normal · IT n=1 £3.51

How is this value calculated?

Ladder estimate · English · ~£5.13 gruen

Evidence path	Sales	Age	Value vᵢ	Weight gᵢ
eigene rohe NM-Verkäufe	2	2 mo	£5.13	16.33

value = exp( Σ gᵢ·ln vᵢ ⁄ Σ gᵢ ) = £5.13 · Σ g = 16.33

Measured error for this era×language (backtest): ±17 %

PSA Population EN Σ 106

PSA 10

11 10%

PSA 9

13 12%

PSA 8

4 4%

PSA ≤7

78 74%

PSA · Prerelease-Staff · as of 2026-10-01

Recent sales · 6

2026-09-04	EN	RAW NM	Pokemon SWSH: Sword & Shield Promo Cards #SWSH006 Rillaboom · eBay	£6.58
2026-06-27	EN	RAW UNKNOWN	Rillaboom SWSH006 Black Star Promo Sword and Shield Holo Rar · eBay	£8.86
2026-06-10	ES	RAW UNKNOWN	Pokemon - Rillaboom Holo Estampado - SWSH006 - Tarjeta Promo · eBay	£13.93
2026-06-08	IT	RAW UNKNOWN	🌿 Rillaboom - SWSH006 - Promo Spada e Scudo · eBay	£9.04
2026-05-27	EN	RAW UNKNOWN	Rillaboom SWSH006 Black Star Promo Sword and Shield Holo Rar · eBay	£16.68
2026-05-09	EN	RAW NM	Rillaboom (SWSH006) Black Star Promo -- Sword & Shield -- NM	£1.99

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.