Ungraded vs Grade 8.0 Amazing Spider-Man #339 (1990): price difference
Amazing Spider-Man #339 (1990) value — Ungraded $6 vs Grade 8.0 $37. Grade 8.0 sells for 6.17× Ungraded (+517%). Prices updated August 2026.
Medians of real sold listings per grade, updated August 2026 — how we compute values.
Grade 8.0 sells for 6.17× (+517%) the Ungraded price — a $31 difference per comic.
Grade 6.0 sells for 3.33× (+233%) the Ungraded price — a $14 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Amazing Spider-Man #339 (1990), the jump from Ungraded to Grade 8.0 is worth $31 (6.17×) — 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).