Where do these graded prices come from?

Medians of 15 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 Giratina - SM151 (Prerelease) [Staff] worth it?

Compare the graded medians below against the raw reference price of $385.00 and subtract grading fees. The CardIntel Grading ROI calculator runs this math with live numbers.

Graded Market · 15 completed sales

Giratina - SM151 (Prerelease) [Staff] graded prices.

As of August 1, 2026, Giratina - SM151 (Prerelease) [Staff] (SM Black Star Promos #SM151) trades across the graded ladder below, based on 15 real eBay completed sales; the raw copy’s reference price is $385.00.

Across SM Black Star Promos, PSA 10 copies sell for 1114.4× their raw reference price on average (94 cards, 5,196 PSA 10 completed sales tracked).

As of August 1, 2026Raw price & chart →Grading ROI calculator →

PSA · Giratina - SM151 (Prerelease) [Staff]

Grade	Median	Sales	vs Raw
Mint 9	$186.00	4	0.5×
NM-MT 8	$350.00	7	0.9×

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.