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Professor's Research · Pokémon Center
SWSH Black Star Promos

Professor's Research · Pokémon Center

SWSH Black Star Promos · SWSH178/307
Illustration: Yusuke Kozaki → All Pokémon Center cards →
Market value · English · Near Mint
$8.26

What is Professor's Research · Pokémon Center SWSH178/307 (SWSH Black Star Promos) worth?

As of 2026-10-24: In Near Mint, an English copy of Professor's Research · Pokémon Center SWSH178/307 is worth about $8.26, based on 1 real sales.

  1. 1
    Real sales

    1 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: Pokémon GO 5th anniversary and Pokémon TCG 25th anniversary / Pokémon GO V Battle Deck—Mewtwo vs. Melmetal · Product insert · Pokémon GO
Unlimited · 2019 SWSH Black Star Promos · SWSH178 $1.57
Market price
$8.26
based on 1 sales
How is this value calculated?
Ladder estimate · English · ~$1.57 gruen
Evidence pathSalesAgeValue vᵢWeight gᵢ
eigene rohe NM-Verkäufe68 11 d $1.57555.1
eigene LP-Verkäufe ÷ 0.874212 17 d $1.124.02
value = exp( Σ gᵢ·ln vᵢ ⁄ Σ gᵢ ) = $1.57 · Σ g = 559.12

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

Ladder estimate · Deutsch · ~$1.72 gruen
Evidence pathSalesAgeValue vᵢWeight gᵢ
en roh NM × 1.0999 (Sprach-Faktor aus 152 Karten)68 11 d $1.721.18
value = exp( Σ gᵢ·ln vᵢ ⁄ Σ gᵢ ) = $1.72 · Σ g = 1.18

Measured error for this era×language (backtest): ±22 %

Ladder estimate · Français · ~$1.76 gelb
Evidence pathSalesAgeValue vᵢWeight gᵢ
en roh NM × 1.1187 (Sprach-Faktor aus 76 Karten)68 11 d $1.763.26
value = exp( Σ gᵢ·ln vᵢ ⁄ Σ gᵢ ) = $1.76 · Σ g = 3.26

Measured error for this era×language (backtest): ±20 %

Gate not green — shown only here, never as the price.

Ladder estimate · Italiano · ~$1.81 gruen
Evidence pathSalesAgeValue vᵢWeight gᵢ
en roh NM × 1.1593 (Sprach-Faktor aus 151 Karten)68 11 d $1.814.0
value = exp( Σ gᵢ·ln vᵢ ⁄ Σ gᵢ ) = $1.81 · Σ g = 4.0

Measured error for this era×language (backtest): ±18 %

PSA Population

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

Recent sales · 1
2026-10-07 EN RAW NM **Sealed** Pokemon Center Exclusive Professor's Research SWS · eBay $8.26
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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.