Ungraded vs Grade 8.0 Detective Comics #309 (1962): price difference
Detective Comics #309 (1962) value — Ungraded $27 vs Grade 8.0 $187. Grade 8.0 sells for 6.93× Ungraded (+593%). Prices updated September 2026.
Medians of real sold listings per grade, updated September 2026 — how we compute values.
Grade 8.0 sells for 6.93× (+593%) the Ungraded price — a $160 difference per comic.
Grade 6.0 sells for 4.26× (+326%) the Ungraded price — a $88 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Detective Comics #309 (1962), the jump from Ungraded to Grade 8.0 is worth $160 (6.93×) — 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).