Ungraded vs Grade 8.0 Invincible [Retailer Summit] #135 (2017): price difference
Invincible [Retailer Summit] #135 (2017) value — Ungraded $29 vs Grade 8.0 $30. Grade 8.0 sells for 1.03× Ungraded (+3%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
Grade 8.0 sells for 1.03× (+3%) the Ungraded price — a $1 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Invincible [Retailer Summit] #135 (2017), the jump from Ungraded to Grade 8.0 is worth $1 (1.03×) — 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).