![Joe Mauer [Independence Day] #231 2018 Topps Baseball](/api/images/junkpal-products/sports/joe-mauer-independence-day-231-baseball-cards-2018-topps-sport/cover.webp)
Ungraded vs PSA 10 Joe Mauer [Independence Day] #231 2018 Topps Baseball: price difference
Joe Mauer [Independence Day] #231 2018 Topps Baseball value — Ungraded $33 vs PSA 10 $68. PSA 10 sells for 2.06× Ungraded (+106%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
PSA 10 sells for 2.06× (+106%) the Ungraded price — a $35 difference per card.
PSA 10 sells for 1.58× (+58%) the Grade 9 price — a $25 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On Joe Mauer [Independence Day] #231 2018 Topps Baseball, the jump from Ungraded to PSA 10 is worth $35 (2.06×) — 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).