The United States Air Force (USAF) couldn't and wouldn't be selling any foreign nation Predator drones (UAVs). Foreign Military Sales (FMS) must be approved by the State Department of the US government in conjunction with the cognizant military UAV/aircraft/missile program office for current production UAV/military aircraft, or US missiles. What you saw may have been an American Predator operated by the US Border Patrol Service, working in conjunction with the US Customs Service. There are also limitations/prohibitions on FMS resales.
Permission for FMS if granted would then be granted to the UAV/aircraft/missile manufacturer to negotiate price and delivery to a foreign nation if approved by the US Department of State. I worked at the Pacific Missile Test Center at NTD with the German government in their AGM-88 HARM missile support equipment procurement, so know the rules and limitations of FMS. With missiles, the current, latest version cannot be sold to a foreign government based on time of negotiation. So, Germany got the missile test set software one version back from current at the time, as well as 1,000 missiles one version back. Auch, Ich sprech Deutsche.
