Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.) Search your library for an artifact card with mana value X or less, put it onto the battlefield, then shuffle.
Near Mint - $9.20
Lightly Played - $8.20
Played - $6.40
Heavily Played - $5.50
Damaged - $4.60
Near Mint Non-English - $9.20
Lightly Played Non-English - $8.20
Played Non-English - $6.40
Heavily Played Non-English - $5.50
Damaged Non-English - $4.60
Foil Prices
Near Mint Foil - $10.60
Lightly Played Foil - $9.60
Played Foil - $7.40
Heavily Played Foil - $6.40
Damaged Foil - $5.30
Near Mint Foil Non-English - $10.60
Lightly Played Foil Non-English - $9.60
Played Foil Non-English - $7.40
Heavily Played Foil Non-English - $6.40
Damaged Foil Non-English - $5.30