Cheapest priced copy (Commander Legends): $1.99 at Card Kingdom, near mint, their price list as of .
Brass Squire 
Artifact Creature — Myr · 1/3 · Uncommon · Mirrodin Besieged · #101
{T}: Attach target Equipment you control to target creature you control.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $1.99 to $7.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Legends | 460 | Uncommon | $1.99 | — |
| Mirrodin Besieged | 101 | Uncommon | $1.99 | $7.99 |
2 rulings from Wizards of the Coast
- 1 June 2011Unlike the equip ability, Brass Squire's ability can be activated whenever you could cast an instant.
- 1 June 2011If one of the targets is illegal when the activated ability resolves, nothing will happen and the Equipment won't move. Notably, if an opponent gains control of either target in response, the Equipment won't move.