Ungraded vs Grade 8.0 Captain Marvel Adventures #18 (1942): price difference
Captain Marvel Adventures #18 (1942) value — Ungraded $489 vs Grade 8.0 $5580. Grade 8.0 sells for 11.41× Ungraded (+1041%). Prices updated August 2026.
Medians of real sold listings per grade, updated August 2026 — how we compute values.
Grade 8.0 sells for 11.41× (+1041%) the Ungraded price — a $5,091 difference per comic.
Grade 6.0 sells for 5.34× (+434%) the Ungraded price — a $2,124 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Captain Marvel Adventures #18 (1942), the jump from Ungraded to Grade 8.0 is worth $5,091 (11.41×) — 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).