![Nidoqueen [Blue Back] #31](/api/images/junkpal-products/cards/nidoqueen-blue-back-31-pokemon-japanese-topsun-card/img0/cover.webp)
Ungraded vs PSA 10 Nidoqueen [Blue Back] #31: price difference
Nidoqueen [Blue Back] #31 value — Ungraded $9 vs PSA 10 $403. PSA 10 sells for 44.78× Ungraded (+4378%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
PSA 10 sells for 44.78× (+4378%) the Ungraded price — a $394 difference per card.
Grade 9 sells for 7.44× (+644%) the Ungraded price — a $58 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On Nidoqueen [Blue Back] #31, the jump from Ungraded to PSA 10 is worth $394 (44.78×) — 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).