Manifest the top card of your library, then put X +1/+1 counters on it. (To manifest a card, put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.)
Near Mint - $300
Near Mint Spanish - $300
Lightly Played - $270
Lightly Played Spanish - $270
Moderately Played - $230
Moderately Played Spanish - $230
Heavily Played - $180
Heavily Played Spanish - $180
Damaged - $120
Damaged Spanish - $120
Foil Prices
Near Mint Foil - $580
Near Mint Foil Spanish - $580
Lightly Played Foil - $530
Lightly Played Foil Spanish - $530
Moderately Played Foil - $440
Moderately Played Foil Spanish - $440
Heavily Played Foil - $350
Heavily Played Foil Spanish - $350
Damaged Foil - $240
Damaged Foil Spanish - $240