You would be saving $28.86 (Items are already discounted to begin with) for both Resident Evil 6 and the RAGE Strategy Guide.
Resident Evil 6 store link
RAGE Strategy Guide store link
The coupon itself gives a $10 discount, shipping is a fixed price of $5 for games as well as a few other things and allows bulk purchases. If you want to pick out an extra game for $5 instead of the RAGE Strategy Guide or even Resident Evil 6 you can, just visit the site and browse from Low to High in Electronics and choose something, there's nothing else there that's decent imo.
If you've already used the coupon once you'll probably have to make a new account, if they notice though they'll likely cancel your order.
This expands on kamoi's post for people who didn't go further into the deal.
thanks, got them both
more games to choose from
http://www.bigw.com.au/entertainment/video-games-consoles/xb…
http://www.bigw.com.au/entertainment/video-games-consoles/xb…