![Koga's Grimer [1st Edition] #78 from Pokemon Gym Challenge](https://images.pokemontcg.io/gym2/78.png)
Koga's Grimer [1st Edition] #78 PSA 10: price & population
PSA 10
$122.50
Raw
$4.33
PSA 10 pop
160
Gem rate
34.5%
A PSA 10 Koga's Grimer [1st Edition] #78 from Gym Challenge sells for $122.50 — a 2,729% premium over the $4.33 raw price. PSA has graded this card 464 times; 160 came back a 10 (34.5% gem rate), and 229 a PSA 9.
The 9-to-10 spread
PSA 9 sells for $36.65. The jump from 9 to 10 is worth $85.85 — 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.
