The MK1 came with an FM tuner and amp, serial and usb cable, car docking tray, AC power adaptor, a remote and a couple stickers.
As far as what to look for: they're all the same with the exception of drive size and faceplate color.
There are some MK1 pictures archived on the geek site:http://geek.empeg.com/

Anyone else care to comment?

Alan