A couple deals by Rainbow Rowell at Amazon:
Eleanore & Park - $1.40 This is a YA I listened to on audio and I really enjoyed it.
Fangirl - $1.40 Although I haven't read this one yet it comes highly rated and I will pick it up based on how well I liked Eleanor & Park. It is set in college, rather than high school, like Eleanor & Park, so the protagonists are slightly older.