This deal has ended.
Buy.com has their refurbished model of the 3rd Edition TomTom One Portable GPS System for $99.49, after a $20 mail-in rebate (through 6/2). Featuring a 3.5" LCD display and voice-prompted navigation, it also comes with maps of the US and Canada pre-loaded with millions of points of interest. New Google Checkout users can get an additional $10 discount. Shipping is free and there is no tax (except CA, MA, MD, TN).