Where do these graded prices come from?

Medians of 38 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 Gyarados (XY Evolutions Prerelease) worth it?

Compare the graded medians below against the raw reference price of $187.93 and subtract grading fees. The CardIntel Grading ROI calculator runs this math with live numbers.

Graded Market · 38 completed sales

Gyarados (XY Evolutions Prerelease) graded prices.

As of August 2, 2026, Gyarados (XY Evolutions Prerelease) (XY Black Star Promos #34) trades across the graded ladder below, based on 38 real eBay completed sales; the raw copy’s reference price is $187.93.

Across XY Black Star Promos, PSA 10 copies sell for 48.3× their raw reference price on average (52 cards, 941 PSA 10 completed sales tracked).

As of August 2, 2026Raw price & chart →Grading ROI calculator →

PSA · Gyarados (XY Evolutions Prerelease)

Grade	Median	Sales	vs Raw
Mint 9	$357.94	4	1.9×
NM-MT 8	$220.06	17	1.2×
NM 7	$118.72	3	0.6×

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.