Looking for a deal on an external usb hard drive

I figured I would post this hear since I'm a bit overwhelmed trying to find a good one. As the title says, I'm in the market for an external usb hard drive. I'm just looking for a really good deal. As for the hard drive size, as long as it's over 100 GB then I'm happy. If you know of any good deals on any, please post em here.

Looking to spend under $50. The lower the better.

I picked up a refurb from WD directly a few months ago. Works fine. I picked it up to use with my Wii so I didn't need a huge one. It was a 250gb for $50.

Also, my WalMart seems to always have some with red tag clearance prices on them. Guess they don't sell well near me. I don't remember all of them...they had several. There was a 1TB drive for $79 (WD) but there were some smaller size drives as well I just didn't note the prices.

Or...if you have a spare hard drive around you're not using, grab a $15 enclosure.