Ungraded vs Grade 8.0 Detective Comics #30 (1939): price difference
Detective Comics #30 (1939) value — Ungraded $3750 vs Grade 8.0 $28542. Grade 8.0 sells for 7.61× Ungraded (+661%). Prices updated September 2026.
Medians of real sold listings per grade, updated September 2026 — how we compute values.
Grade 8.0 sells for 7.61× (+661%) the Ungraded price — a $24,792 difference per comic.
Grade 8.0 sells for 3.67× (+267%) the Grade 6.0 price — a $20,774 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Detective Comics #30 (1939), the jump from Ungraded to Grade 8.0 is worth $24,792 (7.61×) — 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).