Only four?
I haven't lived back east in a while, but is Fat Jack's still there?
I always enjoyed going to Showcase Comics in Bryn Mawr. They seemed to know what they were doing.
In Philadelphia. Fat Jack's in Rittenhouse, BNW in Old City, Atomic City on South St., and Locust Moon in University City.
Showcase Comics in Bryn Mawr is my favorite store. When I lived in Manayunk that was the store I went to. I haven't been back there in the 4 months since I moved to center city. I wasn't a fan of the other they have in the one mall.
I also really like Comic Universe by the airport.
The Granite Run Mall? That's where I did all my purchasing! IF it wasn't for that store I may might not be as serious of a collector. Although in 20/20 hindsight those guys who ran the store never really seemed to care for me all that much.