On a snowy Tuesday in early February, Jessie and Mark Sciulli toured a home in the northern suburbs of Washington, D.C., that wasn't listed for sale yet. Relocating their family back home from overseas, the couple was in town for just two days and had to see as much as possible. Their agent didn't have enough active listings to show, so she went after homes she knew were coming soon.

It is the same story for home buyers nationwide: There is precious, record little for sale.