Ungraded vs PSA 10 Tropical Tidal Wave #HGSS18: price difference
Tropical Tidal Wave #HGSS18 value — Ungraded $728 vs PSA 10 $1663. PSA 10 sells for 2.28× Ungraded (+128%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
PSA 10 sells for 2.28× (+128%) the Ungraded price — a $935 difference per card.
PSA 10 sells for 2.47× (+147%) the Grade 9 price — a $991 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On Tropical Tidal Wave #HGSS18, the jump from Ungraded to PSA 10 is worth $935 (2.28×) — 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).