Where do these graded prices come from?

Medians of 17 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 Gastrodon West Sea worth it?

Compare the graded medians below against the raw reference price of $10.93 and subtract grading fees. The CardIntel Grading ROI calculator runs this math with live numbers.

Graded Market · 17 completed sales

Gastrodon West Sea graded prices.

As of August 22, 2026, Gastrodon West Sea (Secret Wonders #9) trades across the graded ladder below, based on 17 real eBay completed sales; the raw copy’s reference price is $10.93.

Across Secret Wonders, PSA 10 copies sell for 97.4× their raw reference price on average (11 cards, 97 PSA 10 completed sales tracked).

As of August 22, 2026Raw price & chart →Grading ROI calculator →

PSA · Gastrodon West Sea

Grade	Median	Sales	vs Raw
Mint 9	$97.22	4	8.9×
NM-MT 8	$49.99	5	4.6×

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.