The price would have to be very right.
Even the ones you quoted earlier brought it down from laughable to slightly overpriced. Throw away the warranty, and they're going to have a hard time selling anything.
That's the biggest thing...the warranty. Also, getting parts. Cars that are a few years old won't have problem; they'll be parts in the pipeline. Since they just stopped production of the newer cars, there's not going to be a hell of a lot of replacement parts. Godforbid you need something like a transmission.