Normally I wouldn`t do this but I just found this place so fraudulent in it`s advertising that I feel compelled to warn others. The Blue Parrot bookstore in Tokyo advertises about buying and selling english language books and highlights guidebooks especially saying they`ll pay up to 50% of cover. When you call they say they want your books and to bring them in. I went in with three current edition Japan guides in very good shape looking to just trade them in (hoping to get a LP Korea or something simillar). They offered me $3 us for the three and wouldn`t even consider a 3 for one swap (even if I threw in a novel and some cash). To make matters worse when i checked their shelves they don:t have any guides more recent than 2002 and they start at about $30 for anything about Japan and go up as high as $40 something on some other countries guides.
Considering that metro fare to get there is worth much more than what they`ll offer for your books I`d suggest visitors to Tokyo look elsewhere for places to buy and trade in books.
just my two cents, or three yen as the case may be.