I'm clearly a novice at these matters, and smarter people than me have provided us with excellent breakdowns of the situation...but...even to a humble Antipodean like myself, it's obvious that if you buy in order to sell for profit, then you need to invest.
If we take the selling price as an example, as far as I'm aware, it has been 200 million for quite some time. Is that just an aberration or is it indicative of owners who have failed to realise the potential of their asset? If it was 200 million 4 years ago, imagine what it would be worth with some investment in infrastructure?
Perhaps this is what the Americans see. If it's worth that with "classic" infrastructure, imagine what it's worth with some careful investment.