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Bronzong
XY Black Star Promos

Bronzong

XY Black Star Promos · XY21/211
Illustration: match →
Market value · English · Near Mint
£15.00

What is Bronzong XY21/211 (XY Black Star Promos) worth?

As of 2026-10-24: In Near Mint, an English copy of Bronzong XY21/211 is worth about £15.00, based on 4 real sales.

  1. 1
    Real sales

    4 completed Near Mint sales from eBay, Goldin and Fanatics, each one checked on the listing page.

  2. 2
    Outliers out

    Prices far above or below the median are dropped: lots, fakes, mismatched cards.

  3. 3
    Recent counts more

    Newer sales weigh more than old ones, so the value follows the market, not the yearly average.

No estimate, no asking prices. Paid sales only.
Origin: Prerelease / Build & Battle · Tournament / league play · Phantom Forces ≈
Promo Staff Stamp · XY21 £37.38
Market price
£15.00
based on 4 sales
Price history · RAW
2026-08-17 · £8.41 £9.80 · 2026-10-19
Price per print
🇬🇧 Normal · EN n=14 £15.00
How is this value calculated?
Ladder estimate · English · ~£15.00 gruen prerelease
Evidence pathSalesAgeValue vᵢWeight gᵢ
eigene rohe NM-Verkäufe4 28 d £16.5932.65
eigene LP-Verkäufe ÷ 0.70765 25 d £7.314.56
value = exp( Σ gᵢ·ln vᵢ ⁄ Σ gᵢ ) = £15.00 · Σ g = 37.21

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

PSA Population EN Σ 24
PSA 9
4 17%
PSA 8
6 25%
PSA ≤7
14 58%
PSA · Phantom Forces Prerelease-Staff · as of 2026-10-18
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FAQ

Frequently asked questions

How does Last Sold determine the market value?

Last Sold 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.