Well, I'm not selling it, but I do have the OEM system. It's good if you like the OEM factory look, but not for much else. You might want to consider an aftermarket Plug & Play (PnP) for the following benefits...
Cheaper, MUCH cheaper
Display several pieces of info on screen (Mazda can only display one at a time)
My OEM keeps defaulting back from the Artist Name back to Channel Number... this is annoying and haven't figured out what causes it.
PnP's, as the name implies, are portable from car to car (or into your home/office/etc)
Remote Controls... VERY nice for Sat Radio because you can punch in a channel directly. OEM you have to manually tap +1 to get from say, 001 to 050.)
Just some food for thought. Overall, I like my OEM unit, but looking back I think I would rather stick with my aftermarket unit.