Someone asked about op shops close together which are open on a Saturday. Kyneton (a small town to the north of Melbourne) has four op shops, three of which are open on a Saturday.
Salvo's Store 162B Mollison St, Kyneton Open: Mon-Fri 10am-4pm, Sat 9am-1pm
The Preloved Pedlar 136 Mollison St Kyneton Open Mon-Fri 10am to 4pm Sat 9.30am - 12.30pm.
Uniting Church Op Shop 22 Market St Kyneton Open: M: 12.30-2.30pm, T: 1.30-3.30pm, W: 10.30-3.30pm, Th&F: 10-4pm, Sa: 10-12n
If you come on the second Saturday of the month you can have the fun of the Farmer's Market as well.