I am selling my IA 20.1 amp. Its 100% cosmetically but it is blown. I am based in the UK and am a member on this forum and have bought speakers from a member on here before so please be assured. Check out my bmw build for pics of amp towards the end. Solid amp as you all know. From inspection, looks like all the mosfets are blow and a few other components on the power supply side.
http://www.caraudio.com/forum/showthread.php?t=302897&highlight=bmw+install
$280 usd plus shipping to you
http://www.caraudio.com/forum/showthread.php?t=302897&highlight=bmw+install
$280 usd plus shipping to you