Ungraded vs PSA 10 Roy McMillan #421 1966 Topps Baseball: price difference
Roy McMillan #421 1966 Topps Baseball value — Ungraded $3 vs PSA 10 $487. PSA 10 sells for 162.33× Ungraded (+16133%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
PSA 10 sells for 162.33× (+16133%) the Ungraded price — a $484 difference per card.
Grade 9 sells for 42.67× (+4167%) the Ungraded price — a $125 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On Roy McMillan #421 1966 Topps Baseball, the jump from Ungraded to PSA 10 is worth $484 (162.33×) — 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).