Try an Ebay posting but specifically mention that pick up only is possible. You can also post it on www.gumtree.com.au as well.EVERYONE:
I'm selling my brand new, (still in box with unbroken seal) Asus Eee PC 1001HA for $360. RRP $399. Price is negotiable. I'd prefer to sell it to someone from UNSW, because I don't want to deal with postage; I'm only offering local pick-up (from uni - PREFERABLE/Kingsford/Randwick/Kensington/CBD)
Yes, I realise there's a buy/sell forum, but I only really want to sell it to one of you.