I've never bought a new car, so I've never had a warranty. Never felt like I needed one either. Since my wife bought her 2009 Pontiac G6, it's only needed oil changes, tires and gas. So to be honest, not having a warranty isn't that big of a deal to me. But I am probably atypical. I would consider one of those new Saabs left around if it was a good deal.
As far as parts, if it did ever need some, I could probably track them down; I'm pretty resourceful. By the time it needed anything major it would probably be mostly used up anyway. Look at all those people who bought Daewoos at the end. They were cheap, they got a few good years out of them, and threw 'em away.