Ungraded vs PSA 10 John Mayberry #148 1971 Topps Baseball: price difference
John Mayberry #148 1971 Topps Baseball value — Ungraded $2 vs PSA 10 $2070. PSA 10 sells for 1,035× Ungraded (+103400%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
PSA 10 sells for 1,035× (+103400%) the Ungraded price — a $2,068 difference per card.
Grade 9 sells for 862.5× (+86150%) the Ungraded price — a $1,723 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On John Mayberry #148 1971 Topps Baseball, the jump from Ungraded to PSA 10 is worth $2,068 (1,035×) — 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).