Ungraded vs PSA 10 Slowpoke [Master Ball] #18: price difference

Slowpoke [Master Ball] #18 value — Ungraded $6 vs PSA 10 $115. PSA 10 sells for 19.17× Ungraded (+1817%). Prices updated July 2026.

↘ Falling · -20%

GradeSold medianvs Ungraded

Ungraded$6—eBay ↗

Grade 9$183× · +200%eBay ↗

PSA 10$11519.17× · +1817%eBay ↗

Medians of real sold listings per grade, updated July 2026 — how we compute values.

Ungraded vs PSA 10

$6→$115

PSA 10 sells for 19.17× (+1817%) the Ungraded price — a $109 difference per card.

Grade 9 vs PSA 10

$18→$115

PSA 10 sells for 6.39× (+539%) the Grade 9 price — a $97 difference per card.

Should you get this card graded?

Grading runs about $30 per card all-in. On Slowpoke [Master Ball] #18, the jump from Ungraded to PSA 10 is worth $109 (19.17×) — if your copy grades at the top, that premium can cover the fee. A grade below the top one changes the math, so run your exact numbers first.

Run the grading break-even math →

See current eBay listings See sold Slowpoke [Master Ball] #18 listings ↗Full Slowpoke [Master Ball] #18 price guide →

Values are estimates from real sales data — not appraisals or offers. Some links earn JunkPal a commission at no cost to you (disclosure).