Unfortunately the liquidation market works much differently here in Oz as to how it does in North America. Being that our consumer market is much, much smaller, retailers typically don't order in a large enough volume that sees them get stuck with merchandise that they need to clear.
If a retailer does have stock to clear, they will usually clear that stock through a sale.
If a retailer is going to clear stock the most popular avenue here will usually be a one off sale through Auction Houses, either on site or at the Auction House itself.
What you can do is look at approaching manufacturers and wholesalers yourself, as they will usually always have this type of stock available, it's just that they will usually clear it through their normal distribution avenues.
Some will even end up destroying it. I used to work for an electrical wholesaler years ago, and you wouldn't believe the amount of stock we threw out or gave away to good clients because we needed the storage space for new incoming stock.
If someone had of walked in there with 1k, they could have had about 10k worth of stock trucked out. Even selling on somewhere like ebay, would have made close to 4 or 5 times their investment in my opinion.
I would suggest sticking your nose in some doors, you never know what sort of opportunities you can find.