Until the end of the week, if you sign up for Borders' "Shortlist" email newsletter (which comes out every Wednesday, Thursday or Friday with details of new releases, promotions and USUALLY a discount coupon of some sort - last week it was "Buy one Fiction book and get 50% off a second"), you will receive a coupon for $10 off one full-priced book for use at any time in June.
To get the coupon you must sign-up IN-STORE at the South Wharf store, but the coupon can be redeemed at any Borders store in Australia.