Sharper Image has lowered their price on the Third-Generation TomTom One Portable GPS System to just $149.95. Plus, you can get free shipping by activating this coupon (expires 12/31). 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. It has up to two hours of cordless battery life. If you're interested, you should probably act quickly as these never last long.