Koffing
12%of 397 graded came back a PSA 10
How they graded
PSA 10 price, Reverse Foil$50
Printings
Every grade, Reverse Foil
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 1039$50
PSA 9171210 at 9+$20
PSA 8+1 at 8.589300 at 8+$10
PSA 7+1 at 7.518319 at 7+—
PSA 68327 at 6+—
PSA 52329 at 5+—
PSA 40329 at 4+—
PSA 30329 at 3+—
PSA 20329 at 2+—
PSA 11330 at 1+—
One grade up
What the next grade costs, next to how the number of copies changes.
PSA 9 to PSA 10
Costs2.5× moreCopies4.4× fewer$20 to $50 · 171 to 39 copies
PSA 8 to PSA 9
Costs2.0× moreCopies1.9× more$10 to $20 · 89 to 171 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.
