Can someone explain why apple would purchase beats?
Assuming this wasn't sarcastic, Time.com has some interesting arguments:
http://time.com/93557/apple-beats/
So, much more than just headphones, it's also a defensive move against Spotify and other streaming services.
In addition, Apple could use the Beats brand on other platforms (iTunes for Android was long rumored, Apple could now use the Beats brand etc.) and not dilute its brand on cross-platform offerings or confuse consumers.
Also, Beats had well over $1 billion in sales in 2013, Apple is getting something with real revenue.