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PSA 10: PriceCharting; last PSA 10 sale Jun 29, 2026
GemDelta shows Professor's Research (Crown Zenith #150) at $2.05 market price (TCGplayer market). Its Delta multiple is 19.8x.
A PSA 10 Professor's Research (Crown Zenith #150) is currently shown at $49.99. GemDelta labels this as an unverified PriceCharting guide fallback rather than verified recent sales.
GemDelta records a 52.2% gem rate for Professor's Research (Crown Zenith #150), with 169 PSA 10 copies out of 324 total PSA grades and a 19.8x Delta. That describes the grading profile; it is not financial advice.
| Date | Sale |
|---|---|
| Jun 29, 2026 | $34.00 |
| May 2, 2026 | $43.00 |
| Mar 27, 2026 | $50.00 |
| Mar 10, 2026 | $49.99 |
| Mar 1, 2026 | $35.00 |
| Mar 1, 2026 | $54.00 |