Its not a bad place, Been a few changes in the last few years, they kicked revolve out (They moved down the road, and have just been booted from there aswell) so that the Govt. could put a commercial mob in there for full rent (Revolve was classified charity) that was Thiess, who got done for varios issues to do with not paying staff, and they were overpriced.
Now its called Tiny's Green Shed, its run quite well, alloy base mowers $20, others $10 - $15, the best ones sometimes go up to the front for a bit more where they can keep an eye on them, as people do tend to pocket parts off the main lot, which is out back (Most victa LM/G4 will come with no float plate, Briggs lose the fliter housing and varios other bits are nicked.
there the best place left for it, revolve (down for now, but will be back) does not get as many mowers, and often has none, and the mob up at Mitchell (Thiess) usually sell them for $80 (usually somwhat running, or at least close, but not always, and no garauntee)
Apart from that it never hurts to try the scrap metal yards!