Ungraded vs Grade 8.0 Adventure Comics #166 (1951): price difference
Adventure Comics #166 (1951) value — Ungraded $187 vs Grade 8.0 $407. Grade 8.0 sells for 2.18× Ungraded (+118%). Prices updated August 2026.
Medians of real sold listings per grade, updated August 2026 — how we compute values.
Grade 8.0 sells for 2.18× (+118%) the Ungraded price — a $220 difference per comic.
Grade 8.0 sells for 2.26× (+126%) the Grade 6.0 price — a $227 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Adventure Comics #166 (1951), the jump from Ungraded to Grade 8.0 is worth $220 (2.18×) — 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).