Professor's Research
Market price
$46.82
Price history · RAW
2026-05-03 · $0.16
$52.20 · 2026-06-08
How is this value calculated?
Ladder estimate · English
· ~$1.04
gruen
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| eigene rohe NM-Verkäufe | 12 | 2 mo | $1.04 | 97.96 |
value = exp( Σ gᵢ·ln vᵢ ⁄ Σ gᵢ ) = $1.04 · Σ g = 97.96
Measured error for this era×language (backtest): ±16 %
Ladder estimate · Deutsch
· ~$0.92
gruen
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| en roh NM × 0.8837 (Sprach-Faktor aus 72 Karten) | 12 | 2 mo | $0.92 | 3.86 |
value = exp( Σ gᵢ·ln vᵢ ⁄ Σ gᵢ ) = $0.92 · Σ g = 3.86
Measured error for this era×language (backtest): ±19 %
Ladder estimate · Français
· ~$1.34
gelb
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| en roh NM × 1.2796 (Sprach-Faktor aus 51 Karten) | 12 | 2 mo | $1.34 | 1.52 |
value = exp( Σ gᵢ·ln vᵢ ⁄ Σ gᵢ ) = $1.34 · Σ g = 1.52
Measured error for this era×language (backtest): ±25 %
Gate not green — shown only here, never as the price.
Ladder estimate · Italiano
· ~$1.21
gruen
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| en roh NM × 1.1677 (Sprach-Faktor aus 46 Karten) | 12 | 2 mo | $1.21 | 3.89 |
value = exp( Σ gᵢ·ln vᵢ ⁄ Σ gᵢ ) = $1.21 · Σ g = 3.89
Measured error for this era×language (backtest): ±17 %
PSA Population
No PSA numbers for this print yet — in any language.
Recent sales · 3
| 2026-06-08 | EN | RAW UNKNOWN | Professor's Research - (2023) 190/198 Professor Program Reve | $52.20 |
| 2026-05-05 | EN | RAW NM | Professor's Research - 190/198 (2023) [Professor Program Pro | $25.33 |
| 2026-05-03 | EN | RAW UNKNOWN | Professor Program Promos #190/198 Professor's Research | $0.16 |
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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.
Professor's Research Scarlet & Violet · 190/198