Ungraded vs Grade 8.0 Detective Comics #128 (1947): price difference
Detective Comics #128 (1947) value — Ungraded $486 vs Grade 8.0 $2654. Grade 8.0 sells for 5.46× Ungraded (+446%). Prices updated August 2026.
Medians of real sold listings per grade, updated August 2026 — how we compute values.
Grade 8.0 sells for 5.46× (+446%) the Ungraded price — a $2,168 difference per comic.
Grade 6.0 sells for 2.72× (+172%) the Ungraded price — a $834 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Detective Comics #128 (1947), the jump from Ungraded to Grade 8.0 is worth $2,168 (5.46×) — 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).