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PSA 10: 1 sale, last 45 days · Oct 10, 2026 · checked Oct 26, 2026
PSA 9: Median of 4 PSA 9 sales in the last 90 days, latest 2026-09-17. Grade 9 guide (all graders): $204.
Grade 7 and Grade 8 are PriceCharting guides across all graders (PSA, CGC, BGS, SGC, TAG).
GemDelta shows Professor Oak (Base Set #88) at $72.35 market price (TCGplayer market). Its Delta multiple is 27.6x.
A PSA 10 Professor Oak (Base Set #88) is currently shown at $1,996, the only PSA 10 sale in the last 45 days (Oct 10, 2026).
GemDelta records a 11.4% gem rate for Professor Oak (Base Set #88), with 159 PSA 10 copies out of 1,392 total PSA grades and a 27.6x Delta. That describes the grading profile; it is not financial advice.
| Date | Listing | Sale |
|---|---|---|
| Oct 10, 2026 | 1999 Pokemon Card Impostor Professor Oak 73/102 1st Edition PSA 10 Base Set 73/102 | $1995.99 |
| Sep 7, 2026 | PSA 10 GEM MINT Professor Oak 88/102 Base Set 1st Edition Pokemon Card CS1-465 | $2025.00 |
| Jul 16, 2026 | Professor Oak 88/102 1st Edition Base Set 1999 Pokemon GER PSA 10 | $142.14 |
| Jul 10, 2026 | 1999 Pokemon Base Set Professor Oak #88 PSA 10 1st Edition Gem Mint #88 | $2200.00 |