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.
NM-Mint - $4.70
NM-Mint Non English - $4.70
Lightly Played - $4.50
Lightly Played Non English - $4.50
Moderately Played - $4.20
Moderately Played Non English - $4.20
Heavily Played - $3.80
Heavily Played Non English - $3.80
Damaged - $3.10
Damaged Non English - $3.10
Foil Prices
NM-Mint Foil - $6.40
NM-Mint Foil Non English - $6.40
Lightly Played Foil - $6.10
Lightly Played Foil Non English - $6.10
Moderately Played Foil - $5.80
Moderately Played Foil Non English - $5.80
Heavily Played Foil - $5.10
Heavily Played Foil Non English - $5.10
Damaged Foil - $4.20
Damaged Foil Non English - $4.20