Ungraded vs Grade 8.0 Detective Comics #420 (1972): price difference
Detective Comics #420 (1972) value — Ungraded $15 vs Grade 8.0 $160. Grade 8.0 sells for 10.67× Ungraded (+967%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
Grade 8.0 sells for 10.67× (+967%) the Ungraded price — a $145 difference per comic.
Grade 8.0 sells for 3.4× (+240%) the Grade 6.0 price — a $113 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Detective Comics #420 (1972), the jump from Ungraded to Grade 8.0 is worth $145 (10.67×) — 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).