Ungraded vs Grade 8.0 Invincible #31 (2006): price difference
Invincible #31 (2006) value — Ungraded $30 vs Grade 8.0 $34. Grade 8.0 sells for 1.13× Ungraded (+13%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
Grade 8.0 sells for 1.13× (+13%) the Ungraded price — a $4 difference per comic.
Grade 6.0 sells for 1.07× (+7%) the Ungraded price — a $2 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Invincible #31 (2006), the jump from Ungraded to Grade 8.0 is worth $4 (1.13×) — 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).