I purchased a used car in June and this receiver and car kit came with it. I tested it until the original owner's account expired (end of June), so I know that everything works very well.
I'm not a big radio listener, so I have no need for it now that I've decided not to continue paying for the XM service. Everything you need to hook it up and listen in your car is included:

• Audiovox Xpress XM Satellite Radio Receiver
• power source (for car cigarette lighter)
• antenna
• audio cable (to plug into your AUX port)
  For reference, Amazon values a kit like this at $130 new, selling for $103:
  http://www.amazon.com/Audiovox-XMCK20AP-Xpress-R-Satellite-Receiver/dp/B000RYS3S0/ref=sr_1_23?s=car&ie=UTF8&qid=1312053191&sr=1-23
  I'm throwing in the Bracketron Universal cup holder mount (valued at $30 new, selling for $13) as well. Good not only for the receiver but any iPod, PDA, or smartphone.
  http://www.amazon.com/Bracketron-UCH-101-BL-Universal-Holder-Mount/dp/B001UGMTKC/ref=sr_1_3?s=electronics&ie=UTF8&qid=1312059570&sr=1-3