![Slowking [Reverse Holo] #28](/api/images/junkpal-products/cards/slowking-reverse-holo-28-pokemon-great-encounters-card/img0/cover.webp)
Ungraded vs PSA 10 Slowking [Reverse Holo] #28: price difference
Slowking [Reverse Holo] #28 value — Ungraded $12 vs PSA 10 $263. PSA 10 sells for 21.92× Ungraded (+2092%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
PSA 10 sells for 21.92× (+2092%) the Ungraded price — a $251 difference per card.
PSA 10 sells for 4.7× (+370%) the Grade 9 price — a $207 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On Slowking [Reverse Holo] #28, the jump from Ungraded to PSA 10 is worth $251 (21.92×) — 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 →Values are estimates from real sales data — not appraisals or offers. Some links earn JunkPal a commission at no cost to you (disclosure).