Ungraded vs Grade 8.0 Captain Marvel Adventures #137 (1952): price difference
Captain Marvel Adventures #137 (1952) value — Ungraded $47 vs Grade 8.0 $300. Grade 8.0 sells for 6.38× Ungraded (+538%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
Grade 8.0 sells for 6.38× (+538%) the Ungraded price — a $253 difference per comic.
Grade 6.0 sells for 3.6× (+260%) the Ungraded price — a $122 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Captain Marvel Adventures #137 (1952), the jump from Ungraded to Grade 8.0 is worth $253 (6.38×) — 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).