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PSA 10: PriceCharting · last PSA 10 sale $350.00 on Jun 2, 2026 · checked Oct 26, 2026
PSA 9: Median of 5 PSA 9 sales in the last 90 days, latest 2026-10-11. Grade 9 guide (all graders): $75.
Grade 7 and Grade 8 are PriceCharting guides across all graders (PSA, CGC, BGS, SGC, TAG).
GemDelta shows Imposter Professor Oak (Base Set #73) at $6.62 market price (TCGplayer market). Its Delta multiple is 49.5x.
A PSA 10 Imposter Professor Oak (Base Set #73) is currently shown at $328. GemDelta labels this as a PriceCharting guide fallback rather than verified recent sales.
GemDelta records a 19.7% gem rate for Imposter Professor Oak (Base Set #73), with 183 PSA 10 copies out of 928 total PSA grades and a 49.5x Delta. That describes the grading profile; it is not financial advice.
| Date | Listing | Sale |
|---|---|---|
| Jun 2, 2026 | 1999 POKEMON BASE SET UNLIMITED #73 IMPOSTER PROFESSOR OAK PSA 10 #73 | $350.00 |
| May 5, 2026 | 1999 Pokemon Game Base Set Unlimited Imposter Professor Oak #73 PSA 10 GEM MINT #73 | $400.00 |