When Goblin Engineer enters the battlefield, you may search your library for an artifact card, put it into your graveyard, then shuffle. {R}, {T}, Sacrifice an artifact: Return target artifact card with mana value 3 or less from your graveyard to the battlefield.
NM-Mint - $7.40
Lightly Played - $6.70
Moderately Played - $5.90
Heavily Played - $5.20
Damaged - $3.70
NM-Mint Non English - $7.40
Lightly Played Non English - $6.70
Moderately Played Non English - $5.90
Heavily Played Non English - $5.20
Damaged Non English - $3.70