Discontinued brand resale

I wouldn't. Parts will become hard to come by.

cosmetic parts are scarce but u can find drivetrain parts... Saturn = Opel = Chevy . Most Saturns are rebadged Opels

mfg need to keep parts for 10 years for discontinued makes

Parts don't just disappear overnight. Parts must be manufactured for ten years after production stops, and even then most of the important ones are available after that. I bought a 2008 Outlook with no concern whatsoever.