![Sandy Koufax [Legend] #US21 2018 Topps Update Baseball](/api/images/junkpal-products/sports/sandy-koufax-legend-us21-baseball-cards-2018-topps-update-sport/cover.webp)
Ungraded vs PSA 10 Sandy Koufax [Legend] #US21 2018 Topps Update Baseball: price difference
Sandy Koufax [Legend] #US21 2018 Topps Update Baseball value — Ungraded $7 vs PSA 10 $50. PSA 10 sells for 7.14× Ungraded (+614%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
PSA 10 sells for 7.14× (+614%) the Ungraded price — a $43 difference per card.
PSA 10 sells for 3.57× (+257%) the Grade 9 price — a $36 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On Sandy Koufax [Legend] #US21 2018 Topps Update Baseball, the jump from Ungraded to PSA 10 is worth $43 (7.14×) — 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).