Develop Your Brain Sold Prices & eBay Comps (2026)

Sold prices for Develop Your Brain — current market $0.38. Browse recent eBay, PSA APR, and auction sold listings on Guardian TCG.

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Prices updated July 16, 2026. Data sourced from TCGPlayer, eBay, and more. Guardian TCG — free multi-source card pricing for 14+ TCGs.

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How Much Is It Worth?

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Investment & Analysis

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Grading & Condition

Card Grading Guides | PSA vs BGS vs CGC | PSA vs CGC | Pokemon Grade for Profit | Magic: The Gathering Grade for Profit | Yu-Gi-Oh! Grade for Profit | One Piece Grade for Profit | Disney Lorcana Grade for Profit | Digimon Grade for Profit | Star Wars Unlimited Grade for Profit | Dragon Ball Super Grade for Profit

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