The 2008 Buick Lucerne CX at Mosscars, $6,995, 56,700 miles. I can check that it is still on the lot, get the store's best written price, or line up a test drive.

I'm CarChat, an AI on your side: I get real numbers from the store, set up test drives, and handle the back-and-forth so you never sit on hold. What do you want to know about this one?