Where do these graded prices come from?

Medians of 16 real eBay completed sales aggregated per grade (PSA, BGS, CGC) — a completed-sale evidence layer, not listing asks. Sample sizes are shown per grade; thin grades deserve caution.

Is grading Blastoise - 13/95 (Prerelease) worth it?

Compare the graded medians below against the raw reference price of $137.19 and subtract grading fees. The CardIntel Grading ROI calculator runs this math with live numbers.

Graded Market · 16 completed sales

Blastoise - 13/95 (Prerelease) graded prices.

As of August 3, 2026, Blastoise - 13/95 (Prerelease) (HGSS Black Star Promos #13) trades across the graded ladder below, based on 16 real eBay completed sales; the raw copy’s reference price is $137.19.

Across HGSS Black Star Promos, PSA 10 copies sell for 29.4× their raw reference price on average (5 cards, 19 PSA 10 completed sales tracked).

As of August 3, 2026Raw price & chart →Grading ROI calculator →

PSA · Blastoise - 13/95 (Prerelease)

Grade	Median	Sales	vs Raw
Mint 9	$839.30	4	6.1×
NM-MT 8	$184.50	5	1.3×

Medians of real eBay completed sales per grade; small sample sizes deserve caution. Prices are dated reference values — cite them with the as-of date above. Attribution: CardIntel (cardintel.io). See the methodology.