I provide a 3D Virtual tour for all of my listings, and it is always free.
These tours allow prospective buyers to view property in its entirety (look at closet sizes, observe the floor plan, even text them to spouses and loved ones).
3D Virtual Tours are also a fantastic marketing tool. They can be uploaded to websites such as Zillow and Realtor.com. They are also effective marketing tools on social networks such as Facebook.
The extra mile is seldom crowded...