Ungraded vs Grade 8.0 Detective Comics #447 (1975): price difference
Detective Comics #447 (1975) value — Ungraded $12 vs Grade 8.0 $75. Grade 8.0 sells for 6.25× Ungraded (+525%). Prices updated August 2026.
Medians of real sold listings per grade, updated August 2026 — how we compute values.
Grade 8.0 sells for 6.25× (+525%) the Ungraded price — a $63 difference per comic.
Grade 6.0 sells for 3.25× (+225%) the Ungraded price — a $27 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Detective Comics #447 (1975), the jump from Ungraded to Grade 8.0 is worth $63 (6.25×) — 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).