This spell costs X less to cast, where X is the total toughness of creatures you control.
Defender
2UU: Until end of turn, target creature you control gets +1/+0, gains "Whenever this creature deals combat damage to a player, draw cards equal to its toughness," and can attack as though it didn't have defender.
Near Mint - $3.75
Lightly Played - $3.50
Moderately Played - $3.00
Heavily Played - $2.25
Damaged - $2.00
Near Mint Non-English - $3.75
Lightly Played Non-English - $3.50
Moderately Played Non-English - $3.00
Heavily Played Non-English - $2.25
Damaged Non-English - $2.00
Foil Prices
Near Mint Foil - $6.75
Lightly Played Foil - $6.50
Moderately Played Foil - $5.50
Heavily Played Foil - $4.25
Damaged Foil - $3.50
Near Mint Foil Non-English - $6.75
Lightly Played Foil Non-English - $6.50
Moderately Played Foil Non-English - $5.50
Heavily Played Foil Non-English - $4.25
Damaged Foil Non-English - $3.50