Koffing #109 PSA 10: price & population
PSA 10
$222.50
Raw
$1.85
PSA 10 pop
236
Gem rate
42.5%
A PSA 10 Koffing #109 from Japanese Expansion Pack sells for $222.50 — a 11,927% premium over the $1.85 raw price. PSA has graded this card 555 times; 236 came back a 10 (42.5% gem rate), and 226 a PSA 9.
The 9-to-10 spread
PSA 9 sells for $48.29. The jump from 9 to 10 is worth $174.21 — that spread, times your real odds of the 10, is what decides whether grading pays.
Prices from real completed sales, updated daily. Population data from PSA's public population report.
