This deal has ended.
Buy.com has the V7 NAV740 Automobile GPS Navigator for only $99.99. This features a 4.3" LCD touchscreen and voice-prompted navigation. It also comes with maps of all 50 US states pre-loaded on its memory card with 11 million points of interest (gas stations, hotel, ATMs), Sirfstar III chipset, MP3 player, and more. Shipping is free and there is no tax (except CA, MA, MD, NY, TN), though you'll need overnight shipping to receive it by Christmas. Compare this price to $300 at Office Depot.