Ungraded vs Grade 8.0 Adventure Comics #397 (1970): price difference
Adventure Comics #397 (1970) value — Ungraded $11 vs Grade 8.0 $70. Grade 8.0 sells for 6.36× Ungraded (+536%). Prices updated August 2026.
Medians of real sold listings per grade, updated August 2026 — how we compute values.
Grade 8.0 sells for 6.36× (+536%) the Ungraded price — a $59 difference per comic.
Grade 6.0 sells for 3.36× (+236%) the Ungraded price — a $26 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Adventure Comics #397 (1970), the jump from Ungraded to Grade 8.0 is worth $59 (6.36×) — 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).