Second hand is fine- I agree though on the car seats.
Try local trash and treasure markets- my weekly sunday market here in Adelaide always has great baby gear- eg. prams, port-a-cots etc for under $40.
If you are on facebook, try totshop. (just type it in the search box at the top of the page) It is like ebay, but no auction. Local people post baby/kids stuff they are selling and the price they want. You just PM them to say you want to buy it! The things are really cheap, and many people sell bulk lots of clothes/blankets toys etc for around $10-20.
You can also make a request if there is anything you are specifically looking for, and people reply saying "I have one for $X".
The main things you will need are a capsule (you can hire them), cot, pram or baby carrier (prams are handier when shopping!), some clothes and blankets, nappies and wipes. You can change bub on a towel or blanket on the bed, lounge or the floor. And you can bathe bub just in the normal bath, or hold them in the shower (our DS prefered the shower!) Cheap "coles" brand baby shampoo/baby wash works just as well as the expensive stuff, and you only need the tiniest amount for a newborn. If you breastfeed that is free!
Good luck with the hunting!
PS. What town are you in?