Ungraded vs PSA 10 John Mayberry #380 1979 Topps Baseball: price difference
John Mayberry #380 1979 Topps Baseball value — Ungraded $1 vs PSA 10 $583. PSA 10 sells for 583× Ungraded (+58200%). Prices updated June 2026.
Medians of real sold listings per grade, updated June 2026 — how we compute values.
PSA 10 sells for 583× (+58200%) the Ungraded price — a $582 difference per card.
PSA 10 sells for 26.5× (+2550%) the Grade 9 price — a $561 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On John Mayberry #380 1979 Topps Baseball, the jump from Ungraded to PSA 10 is worth $582 (583×) — 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).