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.)
Near Mint - $0.20
Lightly Played - $0.20
Played - $0.20
Heavily Played - $0.10
Damaged - $0.10
Near Mint Non-English - $0.20
Lightly Played Non-English - $0.20
Played Non-English - $0.20
Heavily Played Non-English - $0.10
Damaged Non-English - $0.10
Foil Prices
Near Mint Foil - $0.20
Lightly Played Foil - $0.20
Played Foil - $0.20
Heavily Played Foil - $0.20
Damaged Foil - $0.10
Near Mint Foil Non-English - $0.20
Lightly Played Foil Non-English - $0.20
Played Foil Non-English - $0.20
Heavily Played Foil Non-English - $0.20
Damaged Foil Non-English - $0.10