Ungraded vs Grade 8.0 Flintstones #31 (1965): price difference
Flintstones #31 (1965) value — Ungraded $19 vs Grade 8.0 $153. Grade 8.0 sells for 8.05× Ungraded (+705%). Prices updated August 2026.
Medians of real sold listings per grade, updated August 2026 — how we compute values.
Grade 8.0 sells for 8.05× (+705%) the Ungraded price — a $134 difference per comic.
Grade 6.0 sells for 3.95× (+295%) the Ungraded price — a $56 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Flintstones #31 (1965), the jump from Ungraded to Grade 8.0 is worth $134 (8.05×) — 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).