The deal is advertised through a sign in the window (unfortunately forgot to grab a picture), but can also be confirmed by calling the store on (02) 9906 1557.
I picked up a pair of Comfort Craftsman for $549. Not as good as recent Black Friday sales, but good to support small business and it seems to be the best deal around in the lead up to Christmas. Not sure of the exact end date - I was told "early January". Many sizes and styles were available, but you may wish to call before making the trip across Sydney.
50 Willoughby Rd
Crows Nest NSW 2065
Same price at Airds of Lochinvar in the Hunter Valley too, every day.