Cheapest priced copy (Mirrodin Besieged): $0.35 at Card Kingdom, near mint, their price list as of .
Bladed Sentinel 
Artifact Creature — Construct · 2/4 · Common · Mirrodin Besieged · #98
{W}: This creature gains vigilance until end of turn.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Mirrodin Besieged | 98 | Common | $0.35 | $0.49 |