Professor Oak's New Theory

#015NormalJapanese cardUpdated Aug 22, 2026

eBay average

$1.87

Finish

Market prices

Ungraded prices from each marketplace we track, with sales activity where available.

SourcePriceSalesLast salePer weekSignal

eBay Average USD

$1.87

eBay Average

USD

$1.87

—

eBay Sold USD

$1.87

1 sales

eBay Sold

USD

$1.87

1

—

Average sold price by grading company and grade.

GradeAverage sold price

Grader	10
PSA	$7.682 sold

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Professor Oak's New Theory is a Japanese Pokémon card (#015) from Steelix Constructed Standard Deck, part of the LEGEND series, released in 2010.

An ungraded copy currently sells for about $1.87. A PSA 10 (Gem Mint) averages $7.68 — about 4.1× the raw price.

PokiFrame tracks Professor Oak's New Theory across TCGPlayer, Cardmarket and eBay sales so you can check its value before you buy, sell or trade.

How much is Professor Oak's New Theory worth?: Professor Oak's New Theory from Steelix Constructed Standard Deck has a market price of $1.87 for an ungraded copy, based on current TCGPlayer and eBay sales data. Condition, print variant and grading all move that number.
What is a PSA 10 Professor Oak's New Theory worth?: Recent PSA 10 (Gem Mint) sales of Professor Oak's New Theory averaged $7.68, about 4.1× the ungraded price.