Ungraded vs Grade 6.0 Flintstones #21 (1964): price difference
Flintstones #21 (1964) value — Ungraded $4 vs Grade 6.0 $85. Grade 6.0 sells for 21.25× Ungraded (+2025%). Prices updated August 2026.
Medians of real sold listings per grade, updated August 2026 — how we compute values.
Ungraded vs Grade 6.0
$4→$85
Grade 6.0 sells for 21.25× (+2025%) the Ungraded price — a $81 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Flintstones #21 (1964), the jump from Ungraded to Grade 6.0 is worth $81 (21.25×) — 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).