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.
NM-Mint - $4.30
Lightly Played - $3.90
Moderately Played - $3.50
Heavily Played - $3.00
Damaged - $2.20
NM-Mint Non English - $4.30
Lightly Played Non English - $3.90
Moderately Played Non English - $3.50
Heavily Played Non English - $3.00
Damaged Non English - $2.20
Foil Prices
NM-Mint Foil - $5.00
Lightly Played Foil - $4.50
Moderately Played Foil - $4.00
Heavily Played Foil - $3.50
Damaged Foil - $2.50
NM-Mint Foil Non English - $5.00
Lightly Played Foil Non English - $4.50
Moderately Played Foil Non English - $4.00
Heavily Played Foil Non English - $3.50
Damaged Foil Non English - $2.50