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PSA 10: PriceCharting; last PSA 10 sale Jul 24, 2026
GemDelta shows Professor's Research (Promo #SWSH152) at $3.00 market price (TCGplayer market). Its Delta multiple is 25.0x.
A PSA 10 Professor's Research (Promo #SWSH152) is currently shown at $74.99. GemDelta labels this as an unverified PriceCharting guide fallback rather than verified recent sales.
| Date | Sale |
|---|---|
| Jul 24, 2026 | $74.99 |
| Jul 19, 2026 | $57.18 |
| Jun 22, 2026 | $125.00 |
| Jun 10, 2026 | $60.00 |
| Jun 10, 2026 | $93.56 |
| Mar 31, 2026 | $57.45 |
| Mar 22, 2026 | $54.00 |
| Feb 25, 2026 | $39.00 |