That scenario seems extremely unlikely though. If you talk to FB with the mindset of "just to see what price you can get", I doubt they would have gotten anywhe

That scenario seems extremely unlikely though. If you talk to FB with the mindset of "just to see what price you can get", I doubt they would have gotten anywhere near the 19B price tag. That was an extremely well negotiation process that leads to the price: they must have at least some idea what's going on.