it's in the arcade that backs onto mc donalds in the mall. Go into the mc donalds in the mall, walk through it, and it's directly in front of you on the left. It's a fairly small shop, with a yellow and black sign hanging at head height...
AS they mentioned, if your interested in Wallace they have a player folder with his cards. Also should be some Iguodala in the RC folder so just ask to see them.
there is a place at the junction markets as well.he sells mainly other types of cards but has a cabinet with some singles in it and has a few choices of packs.