The saying used to go: You’ve got two chances — Buckley’s and None.
I was always told it was based on the homophone department store Buckley and Nunn, combined with the older expression Buckley’s chance, which was probably from William Buckley, convict who escaped into the bush and was said to have had little chance of survival.
Where was Buckley and Nunn? In Bourke Street, where David Jones is now. You can still see the name up high on the building.
Nearby, the Target Centre used to be a Coles (with a cafeteria on the first floor where we sometimes went to have a meal), I think the David Jones store on the south side of Bourke Street (with menswear in it) used to be another Coles (both of them being “variety stores” of course, not supermarkets), and the Telstra T-Life shop used to be a Billy Guyatts (where my sister once met two members of Metallica in the basement records section, roughly where Readers Feast is now).