If you want to find your way to Grandma's house on Thanksgiving, you might want to finally buy a car nagivation system.

One GPS device that has been popular this season is the TomTom XL GPS system with touch screen, but the price has hovered at $130 for a while now. I found it today for $119.99 from Staples.

If you already know how to get to Grandma's house and don't want to pony up more than $100 for a GPS, wait until Black Friday, because one of the big bargains this year will be the TomTom system for $79 from both Target and Walmart. An early sneak peak at these mega retailers' fliers, thanks to BFads.net, reveals a host of electronics deals, including the TomTom.

But before you snap up a GPS, you should be aware of the debate over whether such systems make us dumber because. So even if you decide to go digital, don't throw out the tattered map in the glove compartment.