The Amazon MP3 Store offers downloads of over 200 select MP3 albums for $3.99 each. That puts many titles well below what iTunes charges, which is generally $9.99. Choose from artists such as Vampire Weekend, Imogen Heap, Bon Iver, and more. Amazon MP3 downloader is required.

Of note, you can claim a $2 Amazon MP3 Store Credit via coupon code "HEARTMP3". It's valid with several of the above albums, which brings the price down to $1.99 if you haven't already used it.