Cheapest priced copy (Mirrodin Besieged): $0.35 at Card Kingdom, near mint, their price list as of .
Spin Engine 
Artifact Creature — Construct · 3/1 · Common · Mirrodin Besieged · #135
{R}: Target creature can't block this creature this turn.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Mirrodin Besieged | 135 | Common | $0.35 | $0.49 |