Professor's Research [Professor Sada] - 189/198

Professor's Research #189/198 was printed 5 ways and each one sells separately: Promo Reverse Holofoil from Professor Program Promos $13.54; Rare Holofoil from Prize Pack Series Cards $0.47; Rare Reverse Holofoil from SV01: Scarlet & Violet Base Set $0.29; Rare Normal from Prize Pack Series Cards $0.16; Rare Holofoil from SV01: Scarlet & Violet Base Set $0.15 (TCGplayer market, 2026-10-29). Check the set, the rarity mark and any parallel foil, manga art or edition stamp on your copy to know which price is yours; TickerMint prices every printing on its own page.

Professor's Research [Professor Sada] - 189/198 [Holofoil] has a TCGplayer market price of $0.47 as of 2026-10-29. Non-holo copies are $0.16.

Professor's Research [Professor Sada] #189/198 is trending down: $0.47 today, down 4% in 30 days and 49% below its high of $0.92 (2025-08-19), the highest since we began tracking (2024-02-08), but 1.9x its low of $0.25 (2024-04-28). TCGplayer market price as of 2026-10-29, tracked daily since 2024-02-08. Other windows: down 6.0% over 7 days, down 11.3% over 90 days, down 41.3% over a year.

TickerMint began tracking Pokemon prices on 2024-02-08, after Professor's Research [Professor Sada] - 189/198 came out, so these are the highest and lowest prices since we began tracking (2024-02-08), not all-time records. In TickerMint's daily data (since February 2024), the TCGplayer market price for Professor's Research [Professor Sada] - 189/198 [Holofoil] (all conditions) peaked at $0.92 (2025-08-19) and bottomed at $0.25 (2024-04-28).