I dunno, but its possible.
There have been quite a few of these online estate agents opening up recently. There is one in particular which I found has the potential to stir things up a bit,
www.Sweetlocation.co.ukThis property site is completely free to use and users can advertise everything from houses, flats, apartments commercial property to new developments, and it's absolutely free. It's a new site so its a little bare but starting to pick up especially in Birmingham, Maida Vale - London, Leeds, Bradford, Sheffield and Liverpool and I can definitely see it getting bigger.