10 Photograph courtesy of Samson Properties. Where: 6506 Halls Farm Ln., McLean How much: $4,479,240 Listing agent: Yvette Lawless, Samson Properties Buyer's agent: Lizzy Conroy, Keller William Realty This transitional-style home sits on a quiet cul-de-sac within the Halls Manor community. It has six bedrooms, seven bathrooms, two half-baths, an elevator, four fireplaces, a loft, an exercise room,