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 - $7.70
Lightly Played - $7.30
Moderately Played - $6.90
Heavily Played - $6.20
Damaged - $5.00
NM-Mint Non English - $7.70
Lightly Played Non English - $7.30
Moderately Played Non English - $6.90
Heavily Played Non English - $6.20
Damaged Non English - $5.00
Foil Prices
NM-Mint Foil - $14.60
Lightly Played Foil - $13.80
Moderately Played Foil - $13.10
Heavily Played Foil - $11.70
Damaged Foil - $9.50
NM-Mint Foil Non English - $14.60
Lightly Played Foil Non English - $13.80
Moderately Played Foil Non English - $13.10
Heavily Played Foil Non English - $11.70
Damaged Foil Non English - $9.50