Ungraded vs PSA 10 John Sullivan #597 1966 Topps Baseball: price difference
John Sullivan #597 1966 Topps Baseball value — Ungraded $9 vs PSA 10 $1254. PSA 10 sells for 139.33× Ungraded (+13833%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
PSA 10 sells for 139.33× (+13833%) the Ungraded price — a $1,245 difference per card.
Grade 9 sells for 17× (+1600%) the Ungraded price — a $144 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On John Sullivan #597 1966 Topps Baseball, the jump from Ungraded to PSA 10 is worth $1,245 (139.33×) — 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).