I wonder if as a condition of any sale, a private buyer may insist the Scottish Gov takes the passenger terminal on and closes it allowing the viable non Ryanair operation to right size and continue? Without that liability I can see a sale and a future, taking on the grand old lady from 1964, I just see a crying need for even more Capex!
I mean BA do most of their short haul hangared maintenance in Sofia so Ryanair have it easier popping over from DUB or GLA. Cargo goes forward without the costs of the passenger operation.