modern-to-grade · holo
Blastoise-GX
SM Black Star Promos · #SM189 · English · released 2017
Raw market price
$21
7 days
▼ 0.2%
30 days
▼ 4.7%
90 days
▼ 9.3%
Graded prices & PSA population
| Grade | Market price | PSA population |
|---|---|---|
| PSA 10 | $413 | 544 |
| PSA 9 | $48 | 1,036 |
| PSA 8 | $26 | 301 |
PSA population recorded 2026-07-20 · total graded 2,076
Why this card matters
pop
123 active listings and a modest PSA9 premium ($38 vs $22 raw) suggest ample supply; the PSA10 spike to $298 is real but rests on only 5 comps, making scarcity fragile at that tier.
demand
Blastoise carries deep generational nostalgia and GX-era collector loyalty, but SM Black Star Promos are a crowded field with many competing chase cards dampening standout demand.
artist
Standard holo promo treatment with no notable alt-art or celebrated illustrator credit, limiting illustration-driven collector premium.
catalyst
A 7.2% 30-day price bump is mildly positive but not explosive, and the single ACE10 comp at $94 versus PSA10 at $298 signals inconsistent cross-grader pricing rather than a clean breakout.
Graded comps on record
$550
BGS 10
$413
PSA 10
$300
TAG 10
$119
CGC 10
$48
PSA 9
$40
PSA 1
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More from SM Black Star Promos
Market data recorded 2026-07-20 from licensed market sources. MASTER records prices daily and never invents a number — estimated values are always labeled. Not financial advice.