The Trading Post Mobile site at m.tradingpost.com.au allows people to check prices, bid for and buy items with any browser-enabled mobile device.
Trading Post group marketing manager Kellie Cordner said the new mobile capability offers real-time access to Trading Post inventory, including classifieds and auction ad listings.
Trading Post claims more than 85,000 items are listed each week.
The Telstra-owned Trading Post Mobile is free for all Telstra Next G mobile customers via the BigPond portal and free SMS alerts for buyers and sellers informing them when an auction is ending is also a feature.