Up for bid is an awesome Garmin SL 30 that was removed for a panel upgrade. This powerful little unit has a built in glideslope receiver and acts as dual nav-coms by allowing the user to listen to two VHF comm frequencies at once with the monitor function. It will also give a radial to or from the standby nav freq while driving your CDI indicator with the actively selected NAV freq. 

Comes with tray and connectors. I'm not a avionics shop so I can't give a guarantee but it was working great when removed as well as on the bench.