![Casey Mize [SP] #321 2021 Topps Baseball](/api/images/junkpal-products/sports/casey-mize-sp-321-baseball-cards-2021-topps-sport/cover.webp)
Ungraded vs PSA 10 Casey Mize [SP] #321 2021 Topps Baseball: price difference
Casey Mize [SP] #321 2021 Topps Baseball value — Ungraded $5 vs PSA 10 $15. PSA 10 sells for 3× Ungraded (+200%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
PSA 10 sells for 3× (+200%) the Ungraded price — a $10 difference per card.
Grade 9 sells for 2.6× (+160%) the Ungraded price — a $8 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On Casey Mize [SP] #321 2021 Topps Baseball, the jump from Ungraded to PSA 10 is worth $10 (3×) — at today's prices that doesn't cover the fee — grading this one is for the collection, not the flip. 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).