Although this is primarily aimed at guitarists there's a lot of good things for bass players in this box. Apart from the looper which is top class, there's a whole bunch of live drum loops that sound great, and some of the amp sims and effects work very nicely on bass.
Comes with power supply, manual and original box. Asking $150 shipped in the ConUS.
Here's a link to the specs etc. http://line6.com/jm4looper/