Professor Program Promos · #189/198
Professor's Research [Professor Sada]
Professor's Research [Professor Sada] (Professor Program Promos #189/198) trades around $13.52 (Reverse Holofoil, Near Mint) and $297.62 graded PSA 10 (3 recent sales) as of November 10, 2026.
- Illustrator
- kirisAki
ChaseDex earns affiliate commissions from TCGPlayer and eBay purchases at no extra cost to you.
![Professor's Research [Professor Sada] 189/198 from Professor Program Promos](https://tcgplayer-cdn.tcgplayer.com/product/556953_in_800x800.jpg)
I · Specifications
Card details
- Set
- Professor Program Promos
- Number
- #189/198
- Rarity
- Promo
- Type
- Supporter
- Illustrator
- kirisAki
Card
- Market
- $13.52Reverse Holofoil, Near Mint
- PSA 9
- $11.723 sales
- PSA 10
- $297.623 sales · 22.0× market
Pricing live secondary market
All variants & conditions
| Variant / Condition | Price |
|---|---|
| Reverse Holofoil — Near Mint | $13.52 |
II · Reference
Common questions
How much is Professor's Research [Professor Sada] - 189/198 Professor Program Promos #189/198 worth?
The ungraded market price (Reverse Holofoil, Near Mint) is approximately $13.52. PSA 9 copies trade around $11.72 (3 recent sales). PSA 10 copies trade around $297.62 (3 recent sales). Prices are updated daily from publicly available secondary-market data.
How rare is Professor's Research [Professor Sada] - 189/198 #189/198?
Professor's Research [Professor Sada] - 189/198 is a Promo card in Professor Program Promos. Rarer cards typically command higher market prices.
Who illustrated Professor's Research [Professor Sada] - 189/198 #189/198?
Professor's Research [Professor Sada] - 189/198 #189/198 was illustrated by kirisAki.
Should I grade Professor's Research [Professor Sada] - 189/198?
PSA 10 copies trade around $298 across 3 recent sales — roughly 22× the ungraded market price ($14). Grading typically costs $25–$75 and takes 2–6 months. The card needs to be near-perfect (centered, sharp corners, no surface scratches) to grade PSA 10 — inspect with a loupe before submitting.
III · From the Same Set
