Ungraded vs Grade 8.0 Detective Comics #240 (1957): price difference
Detective Comics #240 (1957) value — Ungraded $62 vs Grade 8.0 $579. Grade 8.0 sells for 9.34× Ungraded (+834%). Prices updated August 2026.
Medians of real sold listings per grade, updated August 2026 — how we compute values.
Grade 8.0 sells for 9.34× (+834%) the Ungraded price — a $517 difference per comic.
Grade 6.0 sells for 6.05× (+505%) the Ungraded price — a $313 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Detective Comics #240 (1957), the jump from Ungraded to Grade 8.0 is worth $517 (9.34×) — 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).