As Glenda mentioned below, the house is already under contract. It was listed at $649,900, and we won't know the actual sales price until it goes to settlement. It likely sold for more then the dollar figure in RealtyTrac though. If you are interested in McLean there are a handful of other properties (a couple of short sales and a couple fo regular sales) that are also under $600k.
As a CDPE (Certified Distressed Property Expert), I do understand and know how to work the process, and have gone through numerous short sales and foreclosures on both the listing side, as well as the purchase side of the transaction.
If I can be of assistance, please feel free to email me at firstname.lastname@example.org.
Andy Krumholz, GRI, CDPE