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.
Near Mint - $10.60
Lightly Played - $9.50
Played - $7.40
Heavily Played - $6.40
Damaged - $5.30
Near Mint Non-English - $10.60
Lightly Played Non-English - $9.50
Played Non-English - $7.40
Heavily Played Non-English - $6.40
Damaged Non-English - $5.30