They can probably do that for the bizjets. There are way more than 50 billionaires out there, and they'd all like to have one. There are very few more unique toys to spend that kind of money on.

Agree the airliner is a harder case.

Re. the A380... sounds like they might be about to shut that thing down early. Wouldn't surprise me if they end up buying them back eventually, just so they don't have the product support liability. The last one might even arrive at the recycler before the last 74 rolls off the line.