I've got an acoustic drum kit, not electric though.
For a pretty shitty electric kit you're looking around 800 brand new, but theres no use buying crap drum equipment, you get really shit sound out of it, better off paying say 500 bux extra, and you'll get a really great sounding thing
Second hand, I'm really not sure.. take a look on billyhyde.com.au , tradingpost.com.au or ebay.com.au.. You're better off getting it brand new than second hand.