![Seaking [Master Ball] #21 from Pokemon Prismatic Evolutions](https://images.pokemontcg.io/sv8pt5/21.png)
Seaking [Master Ball] #21 PSA 10: price & population
PSA 10
$108.50
Raw
$3.21
PSA 10 pop
68
Gem rate
29.7%
A PSA 10 Seaking [Master Ball] #21 from Prismatic Evolutions sells for $108.50 — a 3,280% premium over the $3.21 raw price. PSA has graded this card 229 times; 68 came back a 10 (29.7% gem rate), and 128 a PSA 9.
The 9-to-10 spread
PSA 9 sells for $17.70. The jump from 9 to 10 is worth $90.80 — 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.
