Professor's Research SWSH178/307 — SWSH Black Star Promos
Promo · SWSH Black Star Promos
Professor's Research SWSH178/307 SWSH Black Star Promos price today: $0.44 raw, $2.25 PSA 9. PSA pop 20 (15% gem). Updated Oct 9.
Professor's Research SWSH178/307 price
- Current raw price: $0.44 (as of 2026-10-10)
- Past month: +$0.02 (+5%) from $0.42
- Past 3 months: -$0.04 (-8%) from $0.48
- Past year: +$0.06 (+16%) from $0.38
- 1-year high: $0.52, low: $0.33
- About 157 sales a year (PriceCharting)
Graded prices
| Grade | Price |
|---|---|
| Raw | $0.44 |
| PSA 9 | $2.25 |
PSA population
- Total graded: 20
- Gem rate (PSA 10 share): 15%
- Population week: 2026-10-05
| Grade | Graded |
|---|---|
| PSA 7 | 4 |
| PSA 8 | 3 |
| PSA 9 | 10 |
| PSA 10 | 3 |