Ungraded vs Grade 8.0 Adventure Comics #337 (1965): price difference
Adventure Comics #337 (1965) value — Ungraded $7 vs Grade 8.0 $90. Grade 8.0 sells for 12.86× Ungraded (+1186%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
Grade 8.0 sells for 12.86× (+1186%) the Ungraded price — a $83 difference per comic.
Grade 6.0 sells for 10.71× (+971%) the Ungraded price — a $68 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Adventure Comics #337 (1965), the jump from Ungraded to Grade 8.0 is worth $83 (12.86×) — 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).