HeartGold & SoulSilver
#101 · 2010 · 124 cards
Professor Oak's New Theory #101 from HeartGold & SoulSilver is worth $0.90 in Near Mint condition (updated July 25, 2026). A PSA 10 copy sells for $999.95.
Market Price · Near Mint · Updated July 25, 2026
↓ Declining$0.97
Low $0.50Tracked Low
$0.90
Jul 2026
Prices updated Jul 25, 2026
$0.97
Recent market data · NM
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Live listings · Sorted by price
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Type
Trainer
Stage
Supporter
Illustrated by
Ken Sugimori
Professor Oak's New Theory #101 from HeartGold & SoulSilver has a market price of $0.90 in Near Mint condition, last updated July 25, 2026. Prices refresh daily from live marketplace data.
A PSA 10 (Gem Mint) copy of Professor Oak's New Theory #101 sells for $999.95.
Professor Oak's New Theory is down 7.2% over the last 14 days, and up 12.5% over 6 months.
Set Rank · HeartGold & SoulSilver
Professor's Research
25th Anniversary Collection
0.0%14d
Professor's Research
25th Anniversary Collection
-2.6%14d
Professor Birch
ADV Expansion Pack
Professor Oak's Visit
Advent of Arceus
Professor Elm's Lecture
Alter Genesis
-2.3%14d
Professor Sada's Vitality
Ancient Roar
+0.8%14d
Professor Sada's Vitality
Ancient Roar
-2.3%14d
Professor Sada's Vitality
Ancient Roar
0.0%14d
Professor Oak's Visit
Arceus
+2.6%14d
Professor Oak
Base
+7.7%14d
| Condition | Market | vs NM | eBay Sold |
|---|---|---|---|
Near Mint | $0.90 | base | $1.99 |
Lightly Played | $0.55 | -39% | — |
Moderately Played | $0.48 | -47% | — |
Heavily Played | $0.41 | -54% | — |
Damaged | $0.45 | -50% | — |
~ estimated from NM using standard condition discounts · updated when marketplace data is available
7 recent eBay sales
Ungraded + PSA / CGC / BGS grades
| Condition | Market | eBay |
|---|---|---|
| Near MintMost common | $0.90 | $1.99 |
| Lightly Played | $0.55 | — |
| Moderately Played | $0.48 | — |
| Heavily Played | $0.41 | — |
| Damaged | $0.45 | — |
Graded Prices
| Grade | PSA | CGC | BGS | vs Raw |
|---|---|---|---|---|
| ★ 10 | $999.95 | — | — | +111006% |
| 9 | $25.00 | — | — | +2678% |
| 7 | $3.39 | — | — | +277% |
Live market prices · ~ estimated using standard condition discounts
7 recent eBay sales
Tap a grade to see its price history
Ungraded
$0.90
NM raw
