The Barnes & Nobel located in West Valley College (Saratoga, California - just south of San Fran) was busted by NBC News for selling used textbooks to students for $80 when they are for sale on Amazon for $1. They are also for sale on B & N's own website for $2. Click the link below to see the story.
http://www.youtube.com/watch?v=bqv073srF3c