Activated abilities of creatures you control cost X less to activate, where X is Agatha of the Vile Cauldron's power. This effect can't reduce the mana in that cost to less than one mana.
4RG: Other creatures you control get +1/+1 and gain trample and haste until end of turn.
Near Mint - $1.000
Lightly Played - $900
Moderately Played - $700
Heavily Played - $600
Damaged - $600
Near Mint Spanish - $1.000
Lightly Played Spanish - $900
Moderately Played Spanish - $700
Heavily Played Spanish - $600
Damaged Spanish - $600
Foil Prices
Near Mint Foil - $1.800
Lightly Played Foil - $1.500
Moderately Played Foil - $1.300
Heavily Played Foil - $1.100
Damaged Foil - $900
Near Mint Foil Spanish - $1.800
Lightly Played Foil Spanish - $1.500
Moderately Played Foil Spanish - $1.300
Heavily Played Foil Spanish - $1.100
Damaged Foil Spanish - $900