Cheapest priced copy (Commander Legends): $0.35 at Card Kingdom, near mint, their price list as of .
Grafted Wargear 
Artifact — Equipment · Uncommon · Fifth Dawn · #126
Equipped creature gets +3/+2.
Whenever this Equipment becomes unattached from a permanent, sacrifice that permanent.
Equip {0} ({0}: Attach to target creature you control. Equip only as a sorcery.)
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.35 to $4.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Fifth Dawn | 126 | Uncommon | $0.39 | $4.99 |
| Commander Legends | 312 | Uncommon | $0.35 | $0.49 |
3 rulings from Wizards of the Coast
- 1 December 2004If your Grafted Wargear somehow ends up on an opponent's creature and it then becomes unattached from that creature, you won't be able to sacrifice that creature because you don't control it.
- 15 April 2013You may activate this card's equip ability targeting the creature that it is currently attached to, even if it's the only creature you control. Since the equip ability costs zero, you can do this as many times as you like during your main phases, though it generally won't do anything.
- 10 November 2020Grafted Wargear becomes unattached from the creature it's equipping if you equip it to a new creature, if Grafted Wargear leaves the battlefield, if the equipped creature ceases to be a creature, or if Grafted Wargear ceases to be an Equipment. (It also becomes unattached if the equipped creature leaves the battlefield, but the triggered ability won't do anything in that case.)