I have my Zumo 550 I'd like to sell. Everything is there. I even have the original box. In that awesome box are some extra-stylish end-plates (carbon, race stripes, flames, grey). I also have a Powerlet adaptor that I'll include. The adaptor plugs into the motorcycle cradle on one end and a Powerlet socket on the other. It works perfectly with the Heli-Bar risers with the socket built in. I'll update the unit before I send it out as well. The update in it is pretty recent, but I'm sure there's something more recent.
It works great and it needs nothing. $400 shipped right to your door. Save $150 of the lowest price I could find. I can post picture if they're requested.