Ungraded vs Grade 8.0 X-Men [Sketch] #188 (2006): price difference
X-Men [Sketch] #188 (2006) value — Ungraded $18 vs Grade 8.0 $25. Grade 8.0 sells for 1.39× Ungraded (+39%). Prices updated August 2026.
Medians of real sold listings per grade, updated August 2026 — how we compute values.
Grade 8.0 sells for 1.39× (+39%) the Ungraded price — a $7 difference per comic.
Grade 8.0 sells for 1.19× (+19%) the Grade 6.0 price — a $4 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On X-Men [Sketch] #188 (2006), the jump from Ungraded to Grade 8.0 is worth $7 (1.39×) — 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).