![Slowking [Reverse Holo] #28](/api/images/junkpal-products/cards/slowking-reverse-holo-28-pokemon-delta-species-card/img0/cover.webp)
Ungraded vs PSA 10 Slowking [Reverse Holo] #28: price difference
Slowking [Reverse Holo] #28 value — Ungraded $43 vs PSA 10 $2490. PSA 10 sells for 57.91× Ungraded (+5691%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
PSA 10 sells for 57.91× (+5691%) the Ungraded price — a $2,447 difference per card.
PSA 10 sells for 16.6× (+1560%) the Grade 9 price — a $2,340 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 $2,447 (57.91×) — 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).