Amazon takes $2 off select $5 MP3 Albums when you purchase via the Amazon MP3 App for Android or Kindle Fire. Even better, it can be combined with the free $2 Amazon MP3 Store credit you can get via coupon code "MP3S4ALL". Combined, that's $4 off and tied with last month's mention of a similar offer and among the best MP3 credit offers we've seen from Amazon. Choose from albums such as Regina Spektor's What We Saw From The Cheap Seats, Rihanna's Talk That Talk, Katy Perry's One Of The Boys, Jason Mraz's Love Is A Four Letter Word, and more.