The Tesco Outlet site features returned and repaired items such as televisions, digital cameras and vacuum cleaners from brands including Sony, Philips and Samsung, as well as devices from Apple and Canon.
Consumers using an Australian credit card will be able to bid, with the goods shipped to either a UK address or shipped to Australian for an additional postage cost.
The site is located here.
The first of its kind by a mass retailer, the site has goods at a set price as well as goods that consumers will have to bid on.
Last week there was a 4GB iPod shuffle with a list price of $40. In Australia, the same device is selling in the Apple store for $109.
All products sold via the site come with a 12-month warranty, and customers have 14 days to return a product if they do not want it, as long as it is unused.
Tesco said: "The new items are products that were previously available through Tesco stores or Tesco Direct but have now been discontinued. They come complete with all the necessary parts and accessories and are still in their original packaging.
"A large proportion of these items have never been used. They might, for example, be unwanted gifts or products customers have simply changed their mind about," Spokesman Julia Hutton-Potts said.