Craigslist in both San Diego and Phoenix offered on 6 December and earlier a 2008 Cayenne S for $19,200. This is a scam. (The real owner was offering the same car in Phoenix for $50+K!). The scammer is a "single mom who just moved to Bangor, Maine." "Will pay shipping both ways if you dont like the car when it arrives. Etc.
If it seems too good to be true, then it is.