Buy 3 Revlon products and only pay for 2 at Priceline
I have chosen the following items:
Revlon Lashfinder Waterproof Mascara ($19.95)
Revlon Just Bitten™ Lipstain + Balm ($17.95)
Revlon ColorStay™ Longwear Nail Enamel (free - $16.95 off)
So with this promotion and delivery charges to Sydney, I have paid a total of $43.85 for these three products.
Looking for the exact same products elsewhere, the cheapest place I could get all three was from Pharmacy Direct for $52.26 including delivery. In this case giving you a saving of 16%.
It may be possible to find these items cheaper at other stores individually, but then you´ll face separate shipping charges. There are over 80 items to choose from in Priceline´s sale, so plenty of other potentially good combinations to find a bargain.