Amazon has the Coosh Portable Bluetooth 4.0 Extended Range Speaker for only $27.97 Prime shipped (free trial). That’s $122 off the original list price and the lowest Amazon has ever sold it for. The speaker features Bluetooth 4.0 and a built-in mic with noise-cancellation. The battery allows for 5-6 hours of continuous playback and it has an AUX input for other connections.
It received 4.6/5 star reviews from Amazon customers.