Grade 9 vs PSA 10 Bob Boone #520 1984 Topps Baseball: price difference
Bob Boone #520 1984 Topps Baseball value — Grade 9 $6 vs PSA 10 $40. PSA 10 sells for 6.67× Grade 9 (+567%). Prices updated June 2026.
Medians of real sold listings per grade, updated June 2026 — how we compute values.
Grade 9 vs PSA 10
$6→$40
PSA 10 sells for 6.67× (+567%) the Grade 9 price — a $34 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On Bob Boone #520 1984 Topps Baseball, the jump from Grade 9 to PSA 10 is worth $34 (6.67×) — 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).