Noticed this "Special Offer" when I was having a look at some full-priced shoes:
BUY SELECTED FULL-PRICED MEN'S FOOTWEAR AND ACCESSORIES AND RECEIVE 50% OFF THE SECOND ITEM. DISCOUNT APPLIED IN SHOPPING BAG.
Not available in conjunction with any other offer. While stocks last. Offer available until 21/05/2018
Pair this with the increased Cashrewards Cashback rate for David Jones (at least until 11 May 2018 @ 9am) and you should be able to secure a great deal.