Ungraded vs Grade 8.0 Adventure Comics #266 (1959): price difference
Adventure Comics #266 (1959) value — Ungraded $24 vs Grade 8.0 $218. Grade 8.0 sells for 9.08× Ungraded (+808%). Prices updated August 2026.
Medians of real sold listings per grade, updated August 2026 — how we compute values.
Grade 8.0 sells for 9.08× (+808%) the Ungraded price — a $194 difference per comic.
Grade 6.0 sells for 5.25× (+425%) the Ungraded price — a $102 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Adventure Comics #266 (1959), the jump from Ungraded to Grade 8.0 is worth $194 (9.08×) — 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).