Professor Oak's New Theory
HeartGold & SoulSilver · HeartGold & SoulSilver · #101 · Uncommon · illus. Ken Sugimori
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Variant
No price history yet
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Recent eBay sales
- A$3.14
- A$1.39
- A$2.80
- A$1.00
- A$3.09
- A$4.28
- A$3.08
- A$3.08
- A$1.81
- A$6.17
- A$6.17
- A$2.53
- A$1.59
- A$2.00
- A$2.32
- A$1.55
- A$3.08
- A$2.31
Sales prices are AUD-native — actual transactions on eBay AU, not converted from USD.
No recent US sales data yet.
Comps are sourced from eBay US sold listings.
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Professor Oak's New Theory (101/123) is a Pokémon card from HeartGold & SoulSilver in the HeartGold & SoulSilver series. Its current market value is A$1.12, as of 13 Sep 2026. Over the last 30 days it has moved −A$0.08 (−7%), with a 90-day high of A$1.36.
Prices by variant
| Variant | Market price |
|---|---|
| Normal | A$1.12 |
| Reverse Holofoil | A$9.67 |