Ungraded vs PSA 10 Bob Gibson #320 1966 Topps Baseball: price difference
Bob Gibson #320 1966 Topps Baseball value — Ungraded $20 vs PSA 10 $57600. PSA 10 sells for 2,880× Ungraded (+287900%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
PSA 10 sells for 2,880× (+287900%) the Ungraded price — a $57,580 difference per card.
Grade 9 sells for 103.6× (+10260%) the Ungraded price — a $2,052 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On Bob Gibson #320 1966 Topps Baseball, the jump from Ungraded to PSA 10 is worth $57,580 (2,880×) — 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).