I have a brand new condition Pioneer DEH P835R with flexible RCA pre-outs (Front/Rear + Subwoofer or Preout + Dual Main-In) There are 3, two are user selectable between in or out, one is sub only. Sub out has crossover. Unit has a built in Alarm. If your an enthusiast, you know this unit already

I always keep my decks in prestine condition, It's your call. The unit has several bar type eq displays and a flip down/detatchable face.

Heres an image I stole from e-bay