Sorry for being thick, but "what" is why we can't sell the club?
We can't sell the club because the owner has no interest in selling.
Doug will sell, I think, but only on his (very unrealistic) terms.
When Doug is out of the picture the club will be appropriately priced and be snapped up.
As I've posted before, I think the Rothschilds appointment was to do with this. i.e. removing Doug from the process so a realistic price can be agreed with potential buyers.