Found on Dallas.Craigslist in May of '08, about 6 weeks after buying a pristine e39 530 Sport. I tell the seller I gotta sell the 5. He says ok and pulls the craigs post.
Enter credit crisis. 7 months later I finally had a cash buyer for my 5. Amazingly, the ZHP was still tucked away in the seller's garage (he also has a company car).
Very lucky and a very low price. In today's über-tight used car market, that would not happen. Quite the opposite. These days, be prepared to POUNCE once you've found THE ONE...