How much is a PSA 10 Professor's Research: Professor Elm (Prismatic Evolutions #123) worth?

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A PSA 10 Professor's Research: Professor Elm (Prismatic Evolutions #123) is currently shown at $30.77. GemDelta labels this as an unverified PriceCharting guide fallback rather than verified recent sales.

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How much is a PSA 10 Professor's Research: Professor Elm (Prismatic Evolutions #123) worth?