The 1.1 billion dollar sale was for 4 Erieye-fitted Saab 2000 and 1 Saab 2000 without the radar for training purposes. The price of a JF-17 is not $20 million as stated, but $15 million ($17 million export price). That brings the total of 1 AWACS system and four JF-17s to ~$260 million. As I said, the F-35 flyaway cost is $200 million. It will be useless without specialized ground center and maintainance equipment. The costs for that will also run into many millions. Everytime the PAF has to perform maintainance on it, they will have to buy U.S. services for that purpose. And the most maintainance required, is during war. I doubt the U.S. will sell even a missile to Pakistan let alone provide service to their 5th generation jets while they're at war. You can take an example for 1965, 1971 and 1999.