Ungraded vs PSA 10 Felix Mantilla #557 1966 Topps Baseball: price difference
Felix Mantilla #557 1966 Topps Baseball value — Ungraded $16 vs PSA 10 $900. PSA 10 sells for 56.25× Ungraded (+5525%). Prices updated June 2026.
Medians of real sold listings per grade, updated June 2026 — how we compute values.
PSA 10 sells for 56.25× (+5525%) the Ungraded price — a $884 difference per card.
Grade 9 sells for 8.69× (+769%) the Ungraded price — a $123 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On Felix Mantilla #557 1966 Topps Baseball, the jump from Ungraded to PSA 10 is worth $884 (56.25×) — 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).