I have an M-audio audiophile USB for sale. for more information about it go to http://www.m-audio.com/index.php?do=...9588578a74aa58 Its a pro quality usb sound card. I'm getting rid of it because I no longer need my mobile studio and I upgraded my fixed studio to a pro tools set up. This does have a noticable scratch on the left side, however this does not affect the sound quality or functionality of the unit at all. A great solution for people looking to get quality sound on the road with their laptop. The headphone amp section is strong enough to drive the pair of sennheiser 580's that I use. retails for $249 I am asking $170 OBO.