With prices like this you really no longer have an excuse to travel without a GPS unit. $109 gets you this TomTom device, with a 3.5" touch screen, access to the TomTom "home" service and of course pre-loaded US maps.

The unit is refurbished but comes with the same 12 month warranty as a new unit.

Shipping is a very reasonable $4.25 (for ground).

Purchase link: TigerDirect