Professor Oak’s New Theory · League Promo
Market price
$2.48
based on 1 sales
How is this value calculated?
Ladder estimate · English
· ~$1.82
gruen
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| eigene rohe NM-Verkäufe | 3 | 31 d | $1.77 | 24.49 |
| eigene LP-Verkäufe ÷ 0.8316 | 4 | 44 d | $2.98 | 1.62 |
value = exp( Σ gᵢ·ln vᵢ ⁄ Σ gᵢ ) = $1.82 · Σ g = 26.11
Measured error for this era×language (backtest): ±19 %
Ladder estimate · Deutsch
· ~$0.48
rot
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| en roh NM × 0.2736 (Sprach-Faktor aus 19 Karten) | 3 | 31 d | $0.48 | 0.31 |
value = exp( Σ gᵢ·ln vᵢ ⁄ Σ gᵢ ) = $0.48 · Σ g = 0.31
Measured error for this era×language (backtest): ±27 %
Gate not green — shown only here, never as the price.
PSA Population
No PSA numbers for this print yet — in any language.
Recent sales · 1
| 2026-10-06 | EN | RAW UNKNOWN | Professor Oak's New Theory Promo 101/123 League & Championsh · eBay | $2.48 |
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#83 · 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 Oak’s New Theory · League Promo HeartGold SoulSilver · 101/123