You may have Spark Double enter the battlefield as a copy of a creature or planeswalker you control, except it enters with an additional +1/+1 counter on it if it's a creature, it enters with an additional loyalty counter on it if it's a planeswalker, and it isn't legendary if that permanent is legendary.
Near Mint - $7.25
Near Mint Non-English - $7.25
Lightly Played - $6.75
Lightly Played Non-English - $6.75
Moderately Played - $5.75
Moderately Played Non-English - $5.75
Heavily Played - $4.25
Heavily Played Non-English - $4.25
Damaged - $3.75
Damaged Non-English - $3.75
Foil Prices
Near Mint Foil - $6.75
Near Mint Foil Non-English - $6.75
Lightly Played Foil - $6.50
Lightly Played Foil Non-English - $6.50
Moderately Played Foil - $5.50
Moderately Played Foil Non-English - $5.50
Heavily Played Foil - $4.00
Heavily Played Foil Non-English - $4.00
Damaged Foil - $3.50
Damaged Foil Non-English - $3.50