Ungraded vs Grade 8.0 Adventure Comics #306 (1963): price difference
Adventure Comics #306 (1963) value — Ungraded $15 vs Grade 8.0 $275. Grade 8.0 sells for 18.33× Ungraded (+1733%). Prices updated August 2026.
Medians of real sold listings per grade, updated August 2026 — how we compute values.
Grade 8.0 sells for 18.33× (+1733%) the Ungraded price — a $260 difference per comic.
Grade 6.0 sells for 8.67× (+767%) the Ungraded price — a $115 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Adventure Comics #306 (1963), the jump from Ungraded to Grade 8.0 is worth $260 (18.33×) — 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).