In October 1966, just $10 000 (5000 pounds) would land you an apartment in Ourimbah Road, Mosman. It's located near McPherson Street and would be in walking distance of shops at Cremorne Junction and Mosman.
I have included a Google Streetview Reference.
The agent was allowed to advertise in pounds and pence despite the conversion to decimal currency months earlier.
Source: Anonymous. 1966. "Kenthurst" (Advertisement). The Sun, October 14, 48.