Dashboard
PSA 10: PriceCharting; last PSA 10 sale Jun 29, 2026
GemDelta shows Professor's Research: Professor Willow (Go #84) at $9.61 market price (TCGplayer market). Its Delta multiple is 4.21x.
A PSA 10 Professor's Research: Professor Willow (Go #84) is currently shown at $36.35. GemDelta labels this as an unverified PriceCharting guide fallback rather than verified recent sales.
GemDelta records a 49.0% gem rate for Professor's Research: Professor Willow (Go #84), with 241 PSA 10 copies out of 492 total PSA grades and a 4.21x Delta. That describes the grading profile; it is not financial advice.
| Date | Sale |
|---|---|
| Jun 29, 2026 | $39.99 |
| Jun 12, 2026 | $28.00 |
| May 24, 2026 | $36.35 |
| May 22, 2026 | $28.90 |
| May 3, 2026 | $48.99 |
| Apr 28, 2026 | $35.00 |