I could probably get you a Kenwood KDC-MP435U for $110 plus shipping, but it would need to be quick cause there is only one left. I run this head unit and really like it. It has the usb on the front, with the aux coming out the back. Let me know if you would like it (pm me), and if so we can try to work something out.
Go to Best Buy and get it for $120 without shipping.