Ungraded vs Grade 8.0 Superboy #128 (1966): price difference
Superboy #128 (1966) value — Ungraded $10 vs Grade 8.0 $99. Grade 8.0 sells for 9.9× Ungraded (+890%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
Grade 8.0 sells for 9.9× (+890%) the Ungraded price — a $89 difference per comic.
Grade 6.0 sells for 4.3× (+330%) the Ungraded price — a $33 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Superboy #128 (1966), the jump from Ungraded to Grade 8.0 is worth $89 (9.9×) — 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).