FAR Must PE!!, page-198

It is nice to remember that the price was determined when oil around $30 and some forcasting it to stay low for the long haul. The fact now is that oil price has increased to $50+ since the deal went down, OPEC cutting production and now connectivity tests are almost upon us the value will increase further! Time itself has probably doubled the value but the price was a product of the time, I think WPL may have been a lonely bidder back in 1H 2016 and given COP accepted the offer it was probably a fair price considering all external factors and COP need for cash.
I will also remind you that COP still booked a profit on the sale after all drilling costs and what they paid, I am certain they would have gladly taken a better offer if one existed.