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PSA 10: Last PSA 10 sale $81.00 on May 30, 2021 · checked Oct 27, 2026
PSA 9: Median of 1 PSA 9 sale in the last 90 days, latest 2026-10-22. Grade 9 guide (all graders): $40.
Grade 7 and Grade 8 are PriceCharting guides across all graders (PSA, CGC, BGS, SGC, TAG).
A PSA 10 Professor Cozmo's Discovery (Deoxys #90) is currently shown at $81.00. GemDelta labels this as the latest stored PSA 10 sale, which is older than the sales window; no sales were found inside that window.
The Reverse Holo version of Professor Cozmo's Discovery (Deoxys #90) is shown at $19.19 market price. That value is for this stored card variant, not the base printing.
| Date | Listing | Sale |
|---|---|---|
| May 30, 2021 | 2005 Pokemon Ex Deoxys Reverse Holo Professor Cozmo's Discovery #90 PSA 10 GEM | $81.00 |