As long as Trinisphere is untapped, each spell that would cost less than three mana to cast costs three mana to cast. (Additional mana in the cost may be paid with any color of mana or colorless mana. For example, a spell that would cost {1}{B} to cast costs {2}{B} to cast instead.)
Near Mint - $38.700
Lightly Played - $30.900
Moderately Played - $27.100
Heavily Played - $23.200
Damaged - $19.300
Near Mint Spanish - $38.700
Lightly Played Spanish - $30.900
Moderately Played Spanish - $27.100
Heavily Played Spanish - $23.200
Damaged Spanish - $19.300
Foil Prices
Near Mint Foil - $45.400
Lightly Played Foil - $36.400
Moderately Played Foil - $31.800
Heavily Played Foil - $27.300
Damaged Foil - $22.700
Near Mint Foil Spanish - $45.400
Lightly Played Foil Spanish - $36.400
Moderately Played Foil Spanish - $31.800
Heavily Played Foil Spanish - $27.300
Damaged Foil Spanish - $22.700