Ungraded vs Grade 8.0 Adventure Comics #378 (1969): price difference
Adventure Comics #378 (1969) value — Ungraded $5 vs Grade 8.0 $75. Grade 8.0 sells for 15× Ungraded (+1400%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
Grade 8.0 sells for 15× (+1400%) the Ungraded price — a $70 difference per comic.
Grade 6.0 sells for 4.6× (+360%) the Ungraded price — a $18 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Adventure Comics #378 (1969), the jump from Ungraded to Grade 8.0 is worth $70 (15×) — 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).