Used Alpine CDA-7893. Built-in amp, 60w per channel etc, XM-ready. Pulled this from the car I bought. Judging from the finger thick wires that were going from the battery to this unit and to the sub - its probably good for those who like lots of sound So before it goes on eBay, i thought that someone local might want it for some reason. Description and full specs here Comes with what is shown. Manual is available at the link above. These seem to go for around $80+ on ebay, so make me an offer around that and its yours.
In case you're wondering about whether it has an mp3/aux/ipod jack - it does not, but you can get one on ebay for like $15. I haven't tried those though.