The company “AGGPS.CA” is selling reconditioned laptops. The only service they are providing is a laptop with free software on it. The AgOpenGPS software is free to download and free to use. The help page sends you to this discourse. You still must buy and/or assemble the parts yourself.
Any company or individual that is selling you this software is not being upfront with you. You can download any of this software and install it yourself.