I have one of these new but the price has dramaticly dropped on them and this is less than I paid.
http://www.ebay.com/itm/NEW-SONY-XM-GS400-4-CHANNEL-GS-SERIES-CAR-AMPLIFIER-XMGS400-/281216357272?_trksid=p2054897.l4275
great amps. 80x4/ 250x2. Small footprint, easily fits under seat and...