Like Douglas said, Excalibur and Cosmic Monkey are the best places for digging through old back issues. I'm a big fan of Guapo - large selection of new indies and minicomics, but with full selection of new, big-publisher stuff as well. Also coffee. But virtually no back issues, so perhaps not what you're looking for.
And not sure any of the shops are within easy walking distance of each other (unless you're willing to walk on and off buses as part of your expedition).
― arango, Monday, 13 October 2008 17:19 (sixteen years ago) link