![Brock's Mankey [Corocoro Comics] #56 from Pokemon Japanese Promo](https://pokeinvest-japanese-card-images.nyc3.cdn.digitaloceanspaces.com/Promo/087_Brock_27S_Mankey_Corocoro_Comics_56.jpg)
Brock's Mankey [Corocoro Comics] #56 PSA 10: price & population
PSA 10
$766.00
Raw
$6.50
PSA 10 pop
21
Gem rate
13.7%
A PSA 10 Brock's Mankey [Corocoro Comics] #56 from Japanese Promo sells for $766.00 — a 11,685% premium over the $6.50 raw price. PSA has graded this card 153 times; 21 came back a 10 (13.7% gem rate), and 47 a PSA 9.
The 9-to-10 spread
PSA 9 sells for $638.20. The jump from 9 to 10 is worth $127.80 — 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.
