Ungraded vs Grade 8.0 Detective Comics #366 (1967): price difference
Detective Comics #366 (1967) value — Ungraded $12 vs Grade 8.0 $124. Grade 8.0 sells for 10.33× Ungraded (+933%). Prices updated August 2026.
Medians of real sold listings per grade, updated August 2026 — how we compute values.
Grade 8.0 sells for 10.33× (+933%) the Ungraded price — a $112 difference per comic.
Grade 6.0 sells for 8.58× (+758%) the Ungraded price — a $91 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Detective Comics #366 (1967), the jump from Ungraded to Grade 8.0 is worth $112 (10.33×) — 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).