as far as I known, the processing time limit is 6 months for 887.
You have the right to complain it if your case is excess the time limit, like 53927741. That is what I suggested him before - did not just wait, mate, you need to do sth for yourself and us. I know that you are planning to buy a house, so let your CO knows about this - action!. I will definitely write a official letter to IMMI this week regarding to my case. Hopefully, I will hear from them soon.
If you have lodged a GSM visa application, but have not yet been contacted by a case officer, and you have further enquiries, use the GSM Post-Lodgement Enquiry Form at: http://www.immi.gov.au/contacts/forms/gsm/post.htm