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 Holofoil from SV01: Scarlet & Violet Base Set $0.16; Rare Normal from Prize Pack Series Cards $0.16 (TCGplayer market, 2026-10-28). 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.

Shops and show vendors commonly offer about 70% of market in cash and 80% in store credit. At today's $13.54 market price that is roughly $9.48 cash or $10.83 trade for a near-mint copy. Selling it yourself on TCGplayer or eBay nets more after fees; see the seller-net answer below.

Professor's Research [Professor Sada] - 189/198 [Reverse Holofoil] has a TCGplayer market price of $13.54 as of 2026-10-28.

Professor's Research [Professor Sada] #189/198 is holding steady: $13.54 today, flat over 30 days and 73% below its high of $50.49 (2024-08-15), the highest since we began tracking (2024-02-08), but near its low of $12.27 (2026-08-15). TCGplayer market price as of 2026-10-28, tracked daily since 2024-07-12. Other windows: up 0.0% over 7 days, up 2.2% over 90 days, down 10.5% 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 [Reverse Holofoil] (all conditions) peaked at $50.49 (2024-08-15) and bottomed at $12.27 (2026-08-15).