Creatures get -X/-X until end of turn, where X is your highest commander tax among your commanders. (For example, if you've cast your one commander from your command zone twice, creatures get -4/-4 until end of turn.)
Near Mint - $11,900
Lightly Played - $9,500
Moderately Played - $8,400
Heavily Played - $7,200
Damaged - $6,000
Near Mint Spanish - $11,900
Lightly Played Spanish - $9,500
Moderately Played Spanish - $8,400
Heavily Played Spanish - $7,200
Damaged Spanish - $6,000