Professor's Research

Prismatic Evolutions · 123/131 ·Common

Illustration: Teeziro → All Master Ball cards →

Professor Program £133.96 3 sales Master Ball £2.58 1 sales Poké Ball £1.30 71 sales Normal £0.79 17 sales

Market price

£2.58

How is this value calculated?

Ladder estimate · English · ~£0.79 gruen

Evidence path	Sales	Age	Value vᵢ	Weight gᵢ
eigene rohe NM-Verkäufe	4	2 mo	£0.79	32.65

value = exp( Σ gᵢ·ln vᵢ ⁄ Σ gᵢ ) = £0.79 · Σ g = 32.65

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

Ladder estimate · Deutsch · ~£0.82 gruen

Evidence path	Sales	Age	Value vᵢ	Weight gᵢ
en roh NM × 1.0407 (Sprach-Faktor aus 92 Karten)	4	2 mo	£0.82	1.97

value = exp( Σ gᵢ·ln vᵢ ⁄ Σ gᵢ ) = £0.82 · Σ g = 1.97

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

Ladder estimate · Français · ~£1.40 gelb

Evidence path	Sales	Age	Value vᵢ	Weight gᵢ
en roh NM × 1.4803 (Sprach-Faktor aus 56 Karten) · Set +30% nachgeführt	4	2 mo	£1.40	1.29

value = exp( Σ gᵢ·ln vᵢ ⁄ Σ gᵢ ) = £1.40 · Σ g = 1.29

Measured error for this era×language (backtest): ±25 %

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

Ladder estimate · Italiano · ~£0.77 gruen

Evidence path	Sales	Age	Value vᵢ	Weight gᵢ
en roh NM × 0.9607 (Sprach-Faktor aus 39 Karten)	4	2 mo	£0.77	2.38

value = exp( Σ gᵢ·ln vᵢ ⁄ Σ gᵢ ) = £0.77 · Σ g = 2.38

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

PSA Population

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

Recent sales · 1

2026-06-10

RAW UNKNOWN

Pokémon TCG Masterball Holo Professor's Research 123/131 La

£2.58

You might also like

Professor's Research (Professor Magnolia)

£4.63

#201 · UR

Professor's Research (Professor Magnolia)

Professor's Research (Professor Magnolia)

Professor's Research (Professor Oak)

£2.09

#24 · UR

Professor Oak's Research

All Professor Research cards →

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.