Deals Plus [1] is a site that has a wide variety of items and some really attractive prices. You may want to look for the 512MB Data Traveler USB Flash Drive (99 cents after rebates). At this price; a great way to try out your first USB drive!
Links:
[1] http://dealspl.us/
[2] https://www.paypal.com/cgi-bin/webscr?cmd=_xclick&business=rick@yourpcpartner.com&item_name=Buy