Thanks Everyone,
Thanks Peter, I actually quite like the Realestate.com.au site and has now become the default one I use. It is unfortunate that it doesn't allow a search field based on acreage size even if it could be grouped as per my original post somehow.
Elders and Buyacres.com.au do indeed do it I see Thanks Michael, will have a look through the selections there too.
much appreciated
cheers
frank