Ungraded vs PSA 10 Mike Flanagan #623 1988 Topps Baseball: price difference
Mike Flanagan #623 1988 Topps Baseball value — Ungraded $1 vs PSA 10 $262. PSA 10 sells for 262× Ungraded (+26100%). Prices updated June 2026.
Medians of real sold listings per grade, updated June 2026 — how we compute values.
Ungraded vs PSA 10
$1→$262
PSA 10 sells for 262× (+26100%) the Ungraded price — a $261 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On Mike Flanagan #623 1988 Topps Baseball, the jump from Ungraded to PSA 10 is worth $261 (262×) — 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).