Cheapest priced copy (Foundations Jumpstart): $0.35 at Card Kingdom, near mint, their price list as of .
Greenwood Sentinel 
Creature — Elf Scout · 2/2 · Common · Core Set 2020 · #174
Vigilance (Attacking doesn't cause this creature to tap.)
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
4 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Foundations Jumpstart | 666 | Common | $0.35 | — |
| Core Set 2019 | 187 | Common | $0.35 | $0.49 |
| Core Set 2020 | 174 | Common | $0.35 | $0.49 |
| The List | M19-187 | Common | $0.35 | — |