![Brock's Golem [1st Edition] #20 from Pokemon Gym Heroes](https://images.pokemontcg.io/gym1/20.png)
Brock's Golem [1st Edition] #20 PSA 10: price & population
PSA 10
$473.25
Raw
$28.21
PSA 10 pop
62
Gem rate
21.7%
A PSA 10 Brock's Golem [1st Edition] #20 from Gym Heroes sells for $473.25 — a 1,578% premium over the $28.21 raw price. PSA has graded this card 286 times; 62 came back a 10 (21.7% gem rate), and 133 a PSA 9.
The 9-to-10 spread
PSA 9 sells for $49.00. The jump from 9 to 10 is worth $424.25 — 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.
