Professor's Research 221/225 — SVP Black Star Promos
Promo · SVP Black Star Promos
Professor's Research 221/225 SVP Black Star Promos price today: $0.22 raw. PSA pop 7 (43% gem). Updated Oct 9.
Professor's Research 221/225 price
- Current raw price: $0.22 (as of 2026-10-09)
- Past month: -$0.02 (-8%) from $0.24
- Past 3 months: +$0.01 (+5%) from $0.21
- About 50 sales a year (PriceCharting)
PSA population
- Total graded: 7
- Gem rate (PSA 10 share): 43%
- Population week: 2026-10-05
| Grade | Graded |
|---|---|
| PSA 8 | 1 |
| PSA 9 | 3 |
| PSA 10 | 3 |