Ungraded vs Grade 8.0 Detective Comics #66 (1942): price difference
Detective Comics #66 (1942) value — Ungraded $900 vs Grade 8.0 $15120. Grade 8.0 sells for 16.8× Ungraded (+1580%). Prices updated August 2026.
Medians of real sold listings per grade, updated August 2026 — how we compute values.
Grade 8.0 sells for 16.8× (+1580%) the Ungraded price — a $14,220 difference per comic.
Grade 6.0 sells for 14× (+1300%) the Ungraded price — a $11,700 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Detective Comics #66 (1942), the jump from Ungraded to Grade 8.0 is worth $14,220 (16.8×) — 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).