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 - $13.80
Lightly Played - $12.40
Moderately Played - $11.10
Heavily Played - $9.70
Damaged - $6.90
NM-Mint Non English - $13.80
Lightly Played Non English - $12.40
Moderately Played Non English - $11.10
Heavily Played Non English - $9.70
Damaged Non English - $6.90