There are some great box set collections of classical music currently on sale for just $2.99 each in Amazon’s MP3 Store, and these collections are LARGE: over 100 tracks each!
The Big Mozart Box (4.5/5 stars)
The Big Handel Box (5/5 stars)
The Big Vivaldi Box (4.5/5 stars)
The Big Baroque Box (4.5/5 stars)
The Big Mahler Box 4.5/5 stars
The Bigger Bach Set (4.5/5 stars) – this one has over 290 tracks!