$250 on ebay, if the bidding falls through I'll accept offers above $150 + shipping

4 x 400 GB HDD's can be included for a very small fee if required but I imagine you'd want to max it (4 x 2 TB) & I can preinstall this for you & configure in a RAID-5 Setup. (approx 1.06 TB total array)

Rackmount NAS, 1U in size.

I can also meet you in Sydney, around Hornsby.

Unit is old but works 100%, never quite cut it for what we required in our not so 'small medium' business. It's linksys branded but I believe cisco own the unit now & has cisco firmware (latest) on it. 1 week return policy (ie; enough time to build a raid-array and test it out) offered, buyer pays return postage.

CISCO NSS4000 - 4 Bay Gigabit Network Storage System Chassis | eBay - 2 days left, it probably won't sell. These units sell for about $900 new.

You need a bit of knowledge about how NAS/RAID works. GUI has wizards for basic tasks.