If you're a devious kind of person and want to keep track of someone, then the Super PocketTrack Covert GPS Tracker is just the thing for you. Being compact in size, you won't have problem sneaking or placing it near your target. The tracker comes in the form of a USB stick that is chock full of software that will monitor the time, date, location and altitude of your target up to an accuracy level of 2.5 meters. The integrated 4MB of flash memory is more than able to record months of location histories before you clear it up. The Super PocketTrack can be yours for $269.