Professor's Research

SVP Black Star Promos · 223/225

Illustration: Taira Akitsu →

Professor Program £36.60 3 sales Normal £1.53 4 sales

Market price

£1.53

Price history · RAW

2026-06-12 · £0.53 £2.97 · 2026-07-13

Price per print

🇬🇧 Normal · EN n=3 £1.53

🇩🇪 Normal · DE 1 sales · too few Last sale £0.85

How is this value calculated?

Ladder estimate · English · ~£1.53 gruen

Evidence path	Sales	Age	Value vᵢ	Weight gᵢ
eigene rohe NM-Verkäufe	2	2 mo	£1.53	16.33

value = exp( Σ gᵢ·ln vᵢ ⁄ Σ gᵢ ) = £1.53 · Σ g = 16.33

Measured error for this era×language (backtest): ±16 %

PSA Population EN Σ 7

PSA 10

3 43%

PSA 9

4 57%

PSA · Professor Program · as of 2026-10-01

Recent sales · 4

2026-07-13	EN	RAW NM	Pokémon TCG Professor's Research SVP 223 Scarlet & Violet Bl · eBay	£0.53
2026-07-10	EN	RAW UNKNOWN	Pokemon - Professor's Research (Magnolia) - SVP223 - SV Prom · eBay	£2.97
2026-06-16	DE	RAW UNKNOWN	Forschung des Professors Prof. Magnolia SVP 223 Pokémon Prom · eBay	£0.85
2026-06-12	EN	RAW UNKNOWN	Professor's Research SVP 223 · eBay	£1.46

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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.