Professor's Research · Professor Program
Market price
£32.36
based on 1 sales
Price history · RAW
2026-10-14 · £12.67
£47.98 · 2026-10-15
How is this value calculated?
Ladder estimate · English
· ~£1.53
gruen
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| eigene rohe NM-Verkäufe | 14 | 8 d | £1.53 | 114.29 |
value = exp( Σ gᵢ·ln vᵢ ⁄ Σ gᵢ ) = £1.53 · Σ g = 114.29
Measured error for this era×language (backtest): ±17 %
Ladder estimate · Deutsch
· ~£1.40
gruen
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| en roh NM × 0.9124 (Sprach-Faktor aus 99 Karten) | 14 | 8 d | £1.40 | 2.35 |
value = exp( Σ gᵢ·ln vᵢ ⁄ Σ gᵢ ) = £1.40 · Σ g = 2.35
Measured error for this era×language (backtest): ±22 %
Ladder estimate · Français
· ~£1.73
gelb
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| en roh NM × 1.1341 (Sprach-Faktor aus 56 Karten) | 14 | 8 d | £1.73 | 2.67 |
value = exp( Σ gᵢ·ln vᵢ ⁄ Σ gᵢ ) = £1.73 · Σ g = 2.67
Measured error for this era×language (backtest): ±20 %
Gate not green — shown only here, never as the price.
Ladder estimate · Italiano
· ~£1.64
gruen
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| en roh NM × 1.0733 (Sprach-Faktor aus 41 Karten) | 14 | 8 d | £1.64 | 4.69 |
value = exp( Σ gᵢ·ln vᵢ ⁄ Σ gᵢ ) = £1.64 · Σ g = 4.69
Measured error for this era×language (backtest): ±18 %
PSA Population
No PSA numbers for this print yet — in any language.
Recent sales · 2
| 2026-10-15 | EN | RAW NM | Pokemon Sealed Reverse Holo Professor Program Professor's Re · eBay | £47.98 |
| 2026-10-14 | EN | RAW UNKNOWN | Professor's Research [Professor Rowan] Reverse Holofoil [PPP · eBay | £12.67 |
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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.
Professor's Research · Professor Program Brilliant Stars · 147/172