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 - $10.400
Lightly Played - $8.400
Moderately Played - $7.300
Heavily Played - $6.300
Damaged - $5.200
Near Mint Spanish - $10.400
Lightly Played Spanish - $8.400
Moderately Played Spanish - $7.300
Heavily Played Spanish - $6.300
Damaged Spanish - $5.200
Foil Prices
Near Mint Foil - $23.800
Lightly Played Foil - $19.100
Moderately Played Foil - $16.700
Heavily Played Foil - $14.300
Damaged Foil - $11.900
Near Mint Foil Spanish - $23.800
Lightly Played Foil Spanish - $19.100
Moderately Played Foil Spanish - $16.700
Heavily Played Foil Spanish - $14.300
Damaged Foil Spanish - $11.900