Graded Market · 4 completed sales
Professor's Research [Professor Willow] (Secret) graded prices.
As of August 2, 2026, Professor's Research [Professor Willow] (Secret) (Pokémon GO #084) in PSA 10 sells for a median of $36.64, based on 4 real eBay completed sales; the raw copy’s reference price is $9.11 — a 4.0× grading premium at the top grade.
Across Pokémon GO, PSA 10 copies sell for 22.3× their raw reference price on average (31 cards, 2,279 PSA 10 completed sales tracked).
PSA · Professor's Research [Professor Willow] (Secret)
| Grade | Median | Sales | vs Raw |
|---|---|---|---|
| Gem Mint 10 | $36.64 | 3 | 4.0× |
Medians of real eBay completed sales per grade; small sample sizes deserve caution. Prices are dated reference values — cite them with the as-of date above. Attribution: CardIntel (cardintel.io). See the methodology.