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PSA 10: Median of 2 sales, last 45 days · newest Oct 6, 2026 · checked Oct 25, 2026
PSA 9: Median of 3 PSA 9 sales in the last 90 days, latest 2026-10-14. Grade 9 guide (all graders): $45.
Grade 7 and Grade 8 are PriceCharting guides across all graders (PSA, CGC, BGS, SGC, TAG).
GemDelta shows Koga's Arbok (Gym Challenge #25) at $16.99 market price (TCGplayer market). Its Delta multiple is 17.0x.
A PSA 10 Koga's Arbok (Gym Challenge #25) is currently shown at $289, the median of 2 PSA 10 sales in the last 45 days (newest Oct 6, 2026).
GemDelta records a 33.2% gem rate for Koga's Arbok (Gym Challenge #25), with 127 PSA 10 copies out of 383 total PSA grades and a 17.0x Delta. That describes the grading profile; it is not financial advice.
| Date | Listing | Sale |
|---|---|---|
| Oct 6, 2026 | 2000 POKEMON GYM CHALLENGE 1ST EDITION #25 KOGA'S ARBOK PSA 10 25/132 | $275.00 |
| Sep 25, 2026 | 2000 POKEMON GYM CHALLENGE #25 KOGA'S ARBOK 1ST EDITION PSA 10 GME MINT | $302.00 |
| Aug 30, 2026 | 2000 POKEMON GYM CHALLENGE #25 KOGA'S ARBOK 1ST EDITION PSA 10 #25 | $189.85 |
| Aug 17, 2026 | 2000 Pokemon Gym Challenge 1ST EDITION #25/132 KOGA'S ARBOK PSA 10 GEM MINT | $275.00 |
| Jul 4, 2026 | 2000 Pokemon Gym Challenge 1st Edition #25 Koga's Arbok PSA 10 GEM MINT 25/132 | $200.00 |
| May 16, 2026 | 2000 Pokemon Gym Challenge 1st Edition #25 Koga's Arbok PSA 10 GEM MINT #25 | $235.08 |
| May 11, 2026 | 2000 POKEMON GYM CHALLENGE 1ST EDITION #25 KOGA'S ARBOK PSA 10 #25 | $140.50 |