Is that ever bizarre! I wonder how long it's been loosening itself to do that!
I've bought machines I knew were not working, in fact, I spent the most I've ever paid for a machine on a machine that wasn't working - my 222. I was thinking about that when I saw the response to this thread. Even if the machine "fails" a bunch of the things on the checklist, it may still be worth it to you, if you know someone who will fix it, or if you have the patience to do it yourself. Just make sure that the price reflects the condition.
My 222 was not working when I bought it. It ran the whole gamut of problems: The "finger" was misplaced, the machine turned hard, the timing was off (someone had been in loosening things without knowing what they were doing). I still brought her home.
The price tag made it easy to look past all of her little flaws.