Ungraded vs PSA 10 Michael Buffer #139 1991 Kayo Boxing: price difference
Michael Buffer #139 1991 Kayo Boxing value — Ungraded $2 vs PSA 10 $110. PSA 10 sells for 55× Ungraded (+5400%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
PSA 10 sells for 55× (+5400%) the Ungraded price — a $108 difference per card.
Grade 9 sells for 16.5× (+1550%) the Ungraded price — a $31 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On Michael Buffer #139 1991 Kayo Boxing, the jump from Ungraded to PSA 10 is worth $108 (55×) — 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).