Head unit: JVC Dignifine 2.1 KD-SH77 $200 off ebay
CD changer: 12 disc JVC $100
Front speakers: Sony 3-way 6x9" $60/pair - about 3 years ago
Rear speakers: Super awesome Ford OEM
Sub: 12" Elemental Designs K driver $130
Sub amp: Rockford Fosgate 150S $0 - borrowed, pretty much stolen now though
Wiring: Knu Konceptz $100
Battery: Optima Red Top $110
Sound deadening: 2 cans of rubberized under coating, with 1 can of normal undercoating to cover all of the trunk $15