Prof. Oak's Research
Illustrated by Ken Sugimori · EX series
Raw Market Value
$5.02
range $3.57 – $189.00
via TCGPlayer
Top graded value
$164.00
CGC 10
from real sold listings
27 recent sales tracked (180d).
Price History
Daily average sale price from eBay sold listings.
180d change
-$72.80 (-97.1%)
7D30D90D180D
Graded Prices
Verified prices across 2 grading services.
PSA
| Grade | Type | Low | Mid | High | Market |
|---|---|---|---|---|---|
| PSA 10 | reverseHolofoil | $73.00 | $73.00 | $73.00 | $73.00 |
| PSA 8 | reverseHolofoil | $10.50 | $10.50 | $10.50 | $10.50 |
| PSA 7 | normal | $29.99 | $29.99 | $29.99 | $29.99 |
| PSA 6 | reverseHolofoil | $51.00 | $51.00 | $51.00 | $51.00 |
CGC
| Grade | Type | Low | Mid | High | Market |
|---|---|---|---|---|---|
| CGC 10 | normal | $164.00 | $164.00 | $164.00 | $164.00 |
| CGC 10 | reverseHolofoil | $74.99 | $74.99 | $74.99 | $74.99 |
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Recent Sales onebay
Real sold listings, most recent first.
- May 20, 2026$2.19
- May 12, 2026$8.00
- May 7, 2026$7.00
- May 1, 2026$74.99
- Apr 18, 2026$7.99
- Apr 14, 2026$24.99
- Apr 5, 2026$10.51
- Apr 3, 2026$125.00
- Mar 14, 2026$5.00
- Mar 4, 2026$0.99
- Feb 26, 2026$5.00
- Feb 23, 2026$8.50
- Feb 23, 2026$6.99
Final sold amounts in USD. Outbound links open the original eBay listing.