Where do these graded prices come from?

Medians of 13 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 Gym Badge (Koga) worth it?

Compare the graded medians below against the raw reference price of $17.71 and subtract grading fees. The CardIntel Grading ROI calculator runs this math with live numbers.

Graded Market · 13 completed sales

Gym Badge (Koga) graded prices.

As of August 21, 2026, Gym Badge (Koga) (XY Black Star Promos #XY207) trades across the graded ladder below, based on 13 real eBay completed sales; the raw copy’s reference price is $17.71.

Across XY Black Star Promos, PSA 10 copies sell for 59.1× their raw reference price on average (52 cards, 904 PSA 10 completed sales tracked).

As of August 21, 2026Raw price & chart →Grading ROI calculator →

PSA · Gym Badge (Koga)

Grade	Median	Sales	vs Raw
Mint 9	$54.50	6	3.1×

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.