What is the cheepsest way to achive GPS?

Get an actual GPS unit like Garmin or Magellen?

Get a second hand laptop or portable PC and buy a gps module and software?

Please let me know what is the cheepest device and or the cheepest combination of devices to get a functional GPS device.

The actual cheapest is to buy a used iDEN cellphone that has GPS in it. I have two i58sr's - both have GPS functions on them, and I can program the units with my own custom Java programs for using the data. Newer iDEN phones have color screens, and still others have even the map software with it too. You dont need to have access to the iDEN service to have it work either.