Ungraded vs Grade 6.0 Action Comics #18 (1939): price difference
Action Comics #18 (1939) value — Ungraded $909 vs Grade 6.0 $3120. Grade 6.0 sells for 3.43× Ungraded (+243%). Prices updated September 2026.
→ Steady
Medians of real sold listings per grade, updated September 2026 — how we compute values.
Ungraded vs Grade 6.0
$909→$3120
Grade 6.0 sells for 3.43× (+243%) the Ungraded price — a $2,211 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Action Comics #18 (1939), the jump from Ungraded to Grade 6.0 is worth $2,211 (3.43×) — 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).