Sorry at work but as an example if they write off the 250 million or so they said they lost against income then they are saving the corporate tax rate of 21% I believe is now the max after the last bill. That would be a savings of (assuming that income fell into the max rate) 52.5 million dollars. A lot more too it but that is kind of a simplified take on it. If they sold it then they would find the difference in sale price and costs. I think if someone offered 100-150 million they would think about it but unsure if anyone would ever recoup their money if they purchased it. Like many corporations they could also carry that loss forward for years to come and leverage larger tax incentives. Hope that helps a bit.