What is a cheap bluetooth audio reciever?

I want to make a portable bluetooth speaker, but I cant seem to find the right bluetooth module. I don't want it to cost too much because I'll probably end up taking it apart, and it has to have low voltage requirements to operate off of lipo batteries. Any help here?

Plenty of people have built them here. There was a great project in the weekly newsletter only yesterday. The core module came from a bought speaker, and then rebuilt.