![Grass Energy [1st Edition] #99](/api/images/junkpal-products/cards/grass-energy-1st-edition-99-pokemon-base-set-card/img0/cover.webp)
Ungraded vs PSA 10 Grass Energy [1st Edition] #99: price difference
Grass Energy [1st Edition] #99 value — Ungraded $11 vs PSA 10 $308. PSA 10 sells for 28× Ungraded (+2700%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
PSA 10 sells for 28× (+2700%) the Ungraded price — a $297 difference per card.
PSA 10 sells for 6.42× (+542%) the Grade 9 price — a $260 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On Grass Energy [1st Edition] #99, the jump from Ungraded to PSA 10 is worth $297 (28×) — 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).