Wow we didn't spend anywhere near that much!
We bought just about everything second hand and saved a HEAP! My DS is now 2 and i think i would have only ever bought about 10 new things for him which included socks, a couple of tops on special and his birthdays presents. Its great because i have another little boy on the way and i have all the stuff i need. I don't know why more mums don't buy second hand- everything i bought for my son is in great condition and i was always very careful to make sure the major things were in excellent conditions eg pram,cot, car seat etc.
I shop at Vinnies,lifeline etc more than i do at the big retail shops like Big w etc.
Here's my list
Cot- $100 bought from a friend
Mattress $40- had clark rubber cut a peice of foam to size- just as good as a more expensive one.
Pram- The first one we got for $5 from a garage sale. We are currently using a 3wheel Valco that we picked up for $15 on ebay
Car seat- $50 Bought from a friend
Booster seat (for DS1)- $30 from garage sale
Bassinette- $130 on ebay- this is probably the most expensive thing we bought!
Clothes and shoes (from birth till now- 2yrs) Around $150 i guess. All from op shops or ebay
Sheets/curtains/doonas/nappy stackers/wraps/blankets- all up $100 from op shops
Breat pump and bottle steriliser- $40 off ebay
Toys- $250 (my son has too many toys!) Most from Vinnies. Recently i picked up a Fisher Price good vibrations rocker for $5!! They retail for around $60 new.

Have i missed anything?
Honestly you really don't need to spend more than a few hundred dollars on bub and you would never guess that the things i've bought are second hand- Honest!
I buy all my clothes (including all my maternity gear- except for underwear of course- although i have picked up a few good bras second hand) from op shops or ebay. I would honestly say that $80 of the content of our house is second hand- from furniture to cutlery- and yet all my friends complement me on how lovely my home is- if only they new