Ungraded vs Grade 8.0 Superboy #21 (1952): price difference
Superboy #21 (1952) value — Ungraded $82 vs Grade 8.0 $896. Grade 8.0 sells for 10.93× Ungraded (+993%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
Grade 8.0 sells for 10.93× (+993%) the Ungraded price — a $814 difference per comic.
Grade 6.0 sells for 4.15× (+315%) the Ungraded price — a $258 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Superboy #21 (1952), the jump from Ungraded to Grade 8.0 is worth $814 (10.93×) — 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).