P Portable GPS are not expensive. They are affordable at buy.com. All of us want to be advanced and ready on the go. And though we can still use paper maps and printouts (save the trees!) for our directions, all the advantage is in using the real time satellite tracking and map data through GPS that also comes with bluetooth, MP3 players, voice command, LCD touch screen and preloaded maps; all is there and be assured that we will never be lost again in wherever you turn with this reliable guide.