Navigation devices were a huge hit last year and while they aren't quite as popular this time around, they're still selling well. "These are good door buster items that stores are really pushing," says Jon Vincent, founder of BlackFriday.info, an online deal site. "Whoever doesn't already have one, will probably end up getting one." Many stores have the exact same models in their ads for roughly the same price. Garmin, TomTom, and Navigon are best-selling brands.