Where to buy screw mount cameras and lenses
In all the usual places where you would look for the second hand equipment.
Local newspaper "for sale" column; second hand shops such as Cash Converters;
many photographic stores have a second hand equipment section. If you are
in Australia a good place to look is the "Photographic Trader" magazine
and a local "Trading post" newspaper. Many information is available on
Canberra Times Classified, for sale section
AllClassified web site in Canberra
Fairfax Market (Not much usually)
Trading post online
Australia Auction sites
The most popular is, of course, the EBAY
Sadly, not many Australian shops put their second hand stock information online.
A good place with regular updates is PhotoCo
Teds has a "preloved" sction on it's web site, but
doesn't update it very often.
That's completely different situation. Many shops specialize in the second
hand photographic gear.
The impact guide
have a good number of links to the second hand equipment shops.