Aura and Equipment spells you cast cost {X} less to cast, where X is Golden-Tail Trainer's power. Whenever Golden-Tail Trainer attacks, other modified creatures you control get +X/+X until end of turn, where X is Golden-Tail Trainer's power. (Equipment, Auras you control, and counters are modifications.)
NM-Mint - $0.10
Lightly Played - $0.10
Moderately Played - $0.10
Heavily Played - $0.10
Damaged - $0.10
NM-Mint Non English - $0.10
Lightly Played Non English - $0.10
Moderately Played Non English - $0.10
Heavily Played Non English - $0.10
Damaged Non English - $0.10
Foil Prices
NM-Mint Foil - $0.20
Lightly Played Foil - $0.10
Moderately Played Foil - $0.10
Heavily Played Foil - $0.10
Damaged Foil - $0.10
NM-Mint Foil Non English - $0.20
Lightly Played Foil Non English - $0.10
Moderately Played Foil Non English - $0.10
Heavily Played Foil Non English - $0.10
Damaged Foil Non English - $0.10