Good one. The city camera shop on Hardware Lane is called Camera Lane, by the way. The owner is Allan Lane who has been a well respected fixture on the local retail scene for many years. His prices are generally at the middle of the medium level and whenever I visit the shop, I have to sit on my hands to control my urge to impulse-buy interesting bits and pieces.
Michael's still sell a more limited assortment of MF film camera gear and occasionally, bits. Camera Exchange has now relocated to some distant place close to the eastern hills (Dandenongs), but personally I found their service had changed for some time before their 'disappearance' and they had lost their edge on the local market I haven't been out to see them out in the boondocks since they moved. Otherewise, there are very few reliable camera shops selling used gear. The Melbourne Camera Club has (I believe) half yearly camera and photo gear sales held in Box Hill are popular outlets for both buyers and sellers, but having written this, I confess I've not been to one of their events for a long time.
You would know all these shops, of course, as almost all Melbourne photographers do. visitors to Our Faire City may find all this of some use.
If anyone knows of other local shop listings, the information will be appreciated by many of us.