Just best make them future proof, for all eventualities, make sure the batteries in them are easily swappable for fuel cells, with the latter optimised to preserve exhaust water as drinkable, for exchange with hydrogen fuel, when that appears in quantity, as soon as folk start to get paid for creation of economic product from domestic and community solar.
Personally I think it might become soon worth investing in an old bugatti V16 or something like that, when they become negative valued, at about the same time as oil goes negative valued again.
I can see things like those having a renaissance of sorts, after hydrogen becomes so ubiquitious we can't use enough of it, but best of all that use being beneficial, always adding value just by its side effects, for the simple reason we finally switched from mathematically negative (extracted) , to the mathematically positive energy of the sun to source all things.