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PSA 10: Median of 2 sales, last 45 days · newest Oct 20, 2026 · checked Oct 25, 2026
Grade 9: No recent PSA 9 sales. PriceCharting Grade 9 guide, mixing PSA, CGC, BGS, SGC and TAG 9s.
Grade 7 and Grade 8 are PriceCharting guides across all graders (PSA, CGC, BGS, SGC, TAG).
GemDelta shows Professor Oak (Base Set #88) at $1.87 market price (TCGplayer market). Its Delta multiple is 77.1x.
A PSA 10 Professor Oak (Base Set #88) is currently shown at $144, the median of 2 PSA 10 sales in the last 45 days (newest Oct 20, 2026).
GemDelta records a 54.2% gem rate for Professor Oak (Base Set #88), with 58 PSA 10 copies out of 107 total PSA grades and a 77.1x Delta. That describes the grading profile; it is not financial advice.
| Date | Listing | Sale |
|---|---|---|
| Oct 20, 2026 | Pokemon Professor Oak 88/102 Base Set 1999-2000 PSA 10 Trainer Card 088/102 | $180.00 |
| Oct 5, 2026 | 1999 POKEMON BASE SET 1999-2000 "4TH PRINT" COPYRIGHT #88 PROFESSOR OAK PSA 10 #88 | $108.34 |
| Jul 16, 2026 | Professor Oak 88/102 Base Set 1999-2000 Game Pokemon PSA 10 88/102 | $150.00 |