Ungraded vs Grade 8.0 Invincible #18 (2004): price difference
Invincible #18 (2004) value — Ungraded $54 vs Grade 8.0 $160. Grade 8.0 sells for 2.96× Ungraded (+196%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
Grade 8.0 sells for 2.96× (+196%) the Ungraded price — a $106 difference per comic.
Grade 8.0 sells for 3.64× (+264%) the Grade 6.0 price — a $116 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Invincible #18 (2004), the jump from Ungraded to Grade 8.0 is worth $106 (2.96×) — 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).