Ungraded vs PSA 10 Mike Shannon #293 1966 Topps Baseball: price difference
Mike Shannon #293 1966 Topps Baseball value — Ungraded $3 vs PSA 10 $1440. PSA 10 sells for 480× Ungraded (+47900%). Prices updated June 2026.
Medians of real sold listings per grade, updated June 2026 — how we compute values.
PSA 10 sells for 480× (+47900%) the Ungraded price — a $1,437 difference per card.
Grade 9 sells for 74.67× (+7367%) the Ungraded price — a $221 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On Mike Shannon #293 1966 Topps Baseball, the jump from Ungraded to PSA 10 is worth $1,437 (480×) — 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).