Rahat's concert ticket was 5 or 6k and still people were there. Alexandra Stan came in Lahore and her concert's ticket was 4k For Atif Aslam, youth will be more attracted so you should set a price which they can afford.
Well when some guys in our uni were trying to arrange Atif Aslam, i think he was asking 7-8 lacks. but this was year ago. Things are changed now for Atif Aslam. He is a shitaaar now. Well, to be honest, I dont like his songs. Best of luck.