$25 rebate after buying Trend Micro for $21.57 at the Good Guys
Although technically free, this requires you to pay upfront for the product and getting your rebate later. When you buy a copy of Trend Micro for $21.57, you can apply for the $25 cashback which will essentially net you a profit of $3.43 per copy purchased. Of course, your local store may run out so you can buy two or three copies and have them delivered to you for $5 postage. You'll end up with at least one extra copy of Trend Micro and a few dollars above what you started. When you buy one copy and have it delivered, it'll net you a profit of $1.86 and having three copies delivered will give you $5.29. There is a limit of three per customers so act fast!