Ungraded vs Grade 8.0 The X-Men #21 (1966): price difference
The X-Men #21 (1966) value — Ungraded $55 vs Grade 8.0 $171. Grade 8.0 sells for 3.11× Ungraded (+211%). Prices updated August 2026.
Medians of real sold listings per grade, updated August 2026 — how we compute values.
Grade 8.0 sells for 3.11× (+211%) the Ungraded price — a $116 difference per comic.
Grade 6.0 sells for 1.85× (+85%) the Ungraded price — a $47 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On The X-Men #21 (1966), the jump from Ungraded to Grade 8.0 is worth $116 (3.11×) — 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).