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PSA 10: 1 sale, last 45 days · Sep 13, 2026 · checked Oct 25, 2026
PSA 9: Median of 7 PSA 9 sales in the last 90 days, latest 2026-10-15. Grade 9 guide (all graders): $90.
Grade 7 and Grade 8 are PriceCharting guides across all graders (PSA, CGC, BGS, SGC, TAG).
GemDelta shows Giovanni's Nidoqueen (Gym Challenge #23) at $30.38 market price (TCGplayer market). Its Delta multiple is 26.3x.
A PSA 10 Giovanni's Nidoqueen (Gym Challenge #23) is currently shown at $800, the only PSA 10 sale in the last 45 days (Sep 13, 2026).
GemDelta records a 31.1% gem rate for Giovanni's Nidoqueen (Gym Challenge #23), with 143 PSA 10 copies out of 460 total PSA grades and a 26.3x Delta. That describes the grading profile; it is not financial advice.
| Date | Listing | Sale |
|---|---|---|
| Sep 13, 2026 | 2000 POKEMON GYM CHALLENGE 1ST EDITION | 23/132 | GIOVANNI'S NIDOQUEEN | PSA 10 #23 | $799.99 |
| Aug 31, 2026 | 2000 Pokemon Gym Challenge 1ST EDITION #23 GIOVANNI'S NIDOQUEEN PSA 10 GEM MINT | $359.94 |
| Aug 15, 2026 | 2000 POKEMON GYM CHALLENGE 1ST ED #23 GIOVANNI'S NIDOQUEEN PSA 10 #23 | $310.00 |
| Jul 3, 2026 | 2000 POKEMON GYM CHALLENGE 1ST ED #23 GIOVANNI'S NIDOQUEEN PSA 10 #23 | $550.00 |
| Jun 14, 2026 | Pokemon Giovanni's Nidoqueen Gym Challenge 1st Edition Rare #23 PSA 10 Gem Mint | $189.39 |
| Jun 7, 2026 | GIOVANNI'S NIDOQUEEN 2000 POKEMON GYM CHALLENGE 1ST EDITION #23 PSA 10 Q3963 #23 | $315.00 |