No info but let us know what you find out. Make sure you get all the info possible on what kind of maintenance the car has had. Without that, say if it's a small dealer that picked it up at auction and has no records, you'll definitely need a ppi and you'll need to assume that there will be a lot of things needed.
Just the 22k asking price is enough to make me cuatious on a car with 137k miles. But if it's in the snap ring range it's most likely either had that done or it's not one that is effected.
Good luck!