Probably around $200. But I'd probably just find one on ebay to get a better deal. In fact I already own a pioneer GM-X352 it says its 80w+80w. (
http://www.pioneerelectronics.com/pn...tailComponent). I've had it for about 5 years from my old system in my old truck. Maybe I could just buy another small amp like this to run to the two other speakers. But again I have no clue if I can have three amps going to the deck. You know one for each set of speakers and one for the bazooka tube.