Planeswalker spells you cast cost {1} less to cast. {W}{U}{B}{R}{G}, {T}: Proliferate X times, where X is the number of planeswalker types among planeswalkers you control. (To proliferate, choose any number of permanents and/or players, then give each another counter of each kind already there.)
NM-Mint - $1.20
Lightly Played - $1.20
Moderately Played - $1.10
Heavily Played - $1.00
Damaged - $0.80
NM-Mint Non English - $1.20
Lightly Played Non English - $1.20
Moderately Played Non English - $1.10
Heavily Played Non English - $1.00
Damaged Non English - $0.80
Foil Prices
NM-Mint Foil - $5.70
Lightly Played Foil - $5.40
Moderately Played Foil - $5.10
Heavily Played Foil - $4.60
Damaged Foil - $3.70
NM-Mint Foil Non English - $5.70
Lightly Played Foil Non English - $5.40
Moderately Played Foil Non English - $5.10
Heavily Played Foil Non English - $4.60
Damaged Foil Non English - $3.70