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 - $31,700
Lightly Played - $25,400
Moderately Played - $22,200
Heavily Played - $19,100
Damaged - $15,900
Near Mint Spanish - $31,700
Lightly Played Spanish - $25,400
Moderately Played Spanish - $22,200
Heavily Played Spanish - $19,100
Damaged Spanish - $15,900