I had the good fortune of stumbling on a 120 GB drive for cheap so I am selling my 20 gig drive. I've only had it 2 months. I did not erase or modify anything before removing it from my 360 so you will not have to download the 20 or so XBLA games that are already on there (you will have to use points to unlock them if you haven't already of course). There are also a few demos on there and of course Hexic.
$50 Paypal only. Price includes shipping to US only.