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 [Reverse Holofoil] has a TCGplayer market price of $0.29 as of 2026-10-29. Holofoil copies are $0.15.

Professor's Research [Professor Sada] #189/198 is trending down: $0.29 today, down 19% in 30 days and 24% below its high of $0.38 (2026-09-16), the highest since we began tracking (2024-02-08), but 2.1x its low of $0.14 (2024-08-18). TCGplayer market price as of 2026-10-29, tracked daily since 2024-02-08. Other windows: up 0.0% over 7 days, down 6.5% over 90 days, up 52.6% over a year. A 30-day drop this size is common after a reprint or a set rotation; the daily chart shows whether it has found a floor.

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 [Reverse Holofoil] (all conditions) peaked at $0.38 (2026-09-16) and bottomed at $0.14 (2024-08-18).