I am just speculating but the 26x might be high because of the 22 years and not 99 with Detroit. And the "Gordie Howe International Bridge" I guess they are calling it opens in 2022.
If there is a way to break down EBITDA for non-Detroit and Detroit I bet we can get super close to the sale price based on Denny's excellent research once again.
For example only, let's say $15M of the EBITDA is 99 year lease money, that's $390M at 26x.
In any case I will be shocked if we sell for less than $400,000,000.