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 - $4.80
NM-Mint Non English - $4.80
Lightly Played - $4.60
Lightly Played Non English - $4.60
Moderately Played - $4.40
Moderately Played Non English - $4.40
Heavily Played - $3.90
Heavily Played Non English - $3.90
Damaged - $3.20
Damaged Non English - $3.20
Foil Prices
NM-Mint Foil - $6.30
NM-Mint Foil Non English - $6.30
Lightly Played Foil - $6.00
Lightly Played Foil Non English - $6.00
Moderately Played Foil - $5.70
Moderately Played Foil Non English - $5.70
Heavily Played Foil - $5.10
Heavily Played Foil Non English - $5.10
Damaged Foil - $4.10
Damaged Foil Non English - $4.10