Bluetooth speakers come in at a variety of price points and corresponding quality levels. Some have more features, and others emphasize sound. But sometimes you see such a good deal that it almost doesn't matter what the speaker does. Woot has the Braven 600 Bluetooth speaker on sale today for just $34.99. It's a refurb, but you'll save a lot on a pretty good speaker.
The Braven 600 is all aluminum and puts out good sound. It has an internal 1400mAh battery and can be used to charge your phone, as well. If you're in the market for a Bluetooth speaker, you could do a lot worse.