Barnes & Noble's used section, Borders, amazon, RightStuf, thrift stores and ebay for English stuff. CDJapan, YesAsia, Mandarake, and Amiami for my doujin and Japanese manga. Sometimes I might find a doujin on ebay or livejournal that's a fair price, but usually they jack the price up waay too high for me, so I go closer. If Toranoana shipped to the states, I'd use them, too. But, they don't.