Pokemon Card Value

Professor Oak's New Theory

HeartGold Collection · #68 · Japanese

Current market price

$1.02

▼ Trending down 8% vs 30-day average

CardMarket Europe, last sales

Trend

$1.02

Low

$0.33

7-day avg

$1.24

30-day avg

$1.11

Based on current CardMarket data, Professor Oak's New Theory from HeartGold Collection trades around $1.02, with recent listings between $0.33 - $1.11. Prices refresh daily from real marketplace sales.

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Graded prices

PriceCharting, from eBay sales (US). Updated Jun 7, 2026

Unlimited

Grade	Price
Raw / ungraded	$2.63
PSA 10

Graded prices are part of CardBeast Pro.Unlock with Pro

Is it worth grading?

Raw / ungraded

$2.63

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PSA 10

Raw, Professor Oak's New Theory sells for about $2.63. CardBeast Pro shows the PSA 10 price and the grading math for this card.

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Frequently asked questions

How much is Professor Oak's New Theory worth?

Professor Oak's New Theory from HeartGold Collection is currently worth about $1.02 based on CardMarket data, with recent listings between $0.33 - $1.11. Prices update daily from real sales.

Is Professor Oak's New Theory worth grading?

Professor Oak's New Theory sells for about $2.63 raw. Grading pays off only when the PSA 10 price is much higher than the raw price plus the grading cost. CardBeast Pro shows the PSA 10 price for this card.

Where can I sell Professor Oak's New Theory?

You can sell Professor Oak's New Theory on CardMarket (Europe), eBay or TCGplayer. Check its recent sold prices first, so you know what buyers really pay.