Slowpoke & Psyduck GX (Secret) 239/236 price

Market estimates from Pokémon Price Tracker for this exact product, printing and condition. Historical charts include up to 365 supplier observations over available history; points may be sampled or interpolated. Coverage varies by card. History checked Oct 2, 2026. Read the methodology.

Graded values are Pokémon Price Tracker’s eBay estimates for the product, not a verified match to the selected printing. The current supplier smart estimate is used when available and not flagged as an outlier; otherwise we use its reported median. Graded charts show historical daily sale averages, which differ from the current smart estimate. Sparse or old sales can make these estimates uncertain.

• PSA 7: smart estimate; low confidence; 1 sales in source sample; calculated Oct 1, 2026; last sale Jun 29, 2026.
• PSA 8: smart estimate; low confidence; 2 sales in source sample; calculated Oct 1, 2026; last sale Jul 16, 2026.
• PSA 9: smart estimate; medium confidence; 19 sales in source sample; calculated Oct 1, 2026; last sale Sep 24, 2026.
• PSA 10: smart estimate; medium confidence; 17 sales in source sample; calculated Oct 1, 2026; last sale Sep 25, 2026.