I believe Game Chest in the Irvine Spectrum has boxes of pokemon singles, but I don't imagine you'll find expensive cards or binders of hard to find ones there. Its' more like, grab bag bulk buying common singles.Are there any local gaming card shops that sell Pokemon singles?
Alakazaam sells packs but doesn't really have singles.
Bookoff has Japanese singles but there isn't anything good and everything is over priced
Frank and Son is great but it is too far.