Professor's Research 221
Trend price · 28 October 2026
€1.07
-12%vs 30-day avg- Lowest
- €0.35
- 1-day avg
- €0.50
- 7-day avg
- €1.03
- 30-day avg
- €1.22
Versions
View on CardmarketDetails
SetSVP Black Star PromosNumber221
Trainer typeSupporter
RarityPromo
IllustratorHideki Ishikawa
Release date31 March 2023
Regulation markGExpanded
Price history
€1.07
-23% since 23 October 2026
€1.00
€1.20
€1.40
€1.0728 Oct
23 Oct28 Oct
| Date | Trend price | Change | Lowest |
|---|---|---|---|
| 28 Oct28 October 2026 | €1.07 | -10% | €0.35 |
| 27 Oct27 October 2026 | €1.19 | -5% | €0.35 |
| 26 Oct26 October 2026 | €1.25 | -5% | €0.35 |
| 24 Oct24 October 2026 | €1.31 | -6% | €0.35 |
| 23 Oct23 October 2026 | €1.39 | – | €0.35 |
