Ungraded vs Grade 8.0 Superman #51 (1991): price difference
Superman #51 (1991) value — Ungraded $8 vs Grade 8.0 $26. Grade 8.0 sells for 3.25× Ungraded (+225%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
Grade 8.0 sells for 3.25× (+225%) the Ungraded price — a $18 difference per comic.
Grade 6.0 sells for 2.25× (+125%) the Ungraded price — a $10 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Superman #51 (1991), the jump from Ungraded to Grade 8.0 is worth $18 (3.25×) — at today's prices that doesn't cover the fee — grading this one is for the collection, not the flip. 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).