Impostor Professor Oak's Invention
42%of 171 graded came back a PSA 10
How they graded
PSA 10 price, 1st Edition$50
Printings
Every grade, 1st Edition
Every grade
Copies at each grade, how many sit at that grade or higher, and PSA’s price where it lists one.
GradeShare of copiesCopiesPSA price
PSA 1053$50
PSA 956109 at 9+$25
PSA 8+1 at 8.512122 at 8+$10
PSA 71123 at 7+—
PSA 60123 at 6+—
PSA 53126 at 5+—
PSA 41127 at 4+—
PSA 30127 at 3+—
PSA 20127 at 2+—
PSA 10127 at 1+—
One grade up
What the next grade costs, next to how the number of copies changes.
PSA 9 to PSA 10
Costs2.0× moreCopies1.1× fewer$25 to $50 · 56 to 53 copies
PSA 8 to PSA 9
Costs2.5× moreCopies4.7× more$10 to $25 · 12 to 56 copies
Takes
Population from PSA as of Sep 12, 2026, across every printing. Prices are PSA’s own price guide figures as of Sep 12, 2026.
