Ungraded vs Grade 8.0 Black Cat #31 (1951): price difference
Black Cat #31 (1951) value — Ungraded $92 vs Grade 8.0 $375. Grade 8.0 sells for 4.08× Ungraded (+308%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
Grade 8.0 sells for 4.08× (+308%) the Ungraded price — a $283 difference per comic.
Grade 8.0 sells for 3.44× (+244%) the Grade 6.0 price — a $266 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Black Cat #31 (1951), the jump from Ungraded to Grade 8.0 is worth $283 (4.08×) — 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).