Buy.com has lowered their price on the refurbished model of the TomTom One Portable GPS System for $159.99, a $30 drop from our August BradsDeals mention. Featuring a 3.5" LCD display and voice-prompted navigation, it also comes with maps of the US and Canada pre-loaded on its memory card. New models are $239 at Buy.com. Plus, new customers can use this $5 off coupon or new Google Checkout can get a $10 off discount (you can't get both). Shipping is free and there is no tax (except CA, MA, MD, TN).