Perhaps the best way to make money on the Internet is to apply the age old adage to "buy low and sell high". It's worked for thousands of years, and it'll work for a thousand more. There's nothing more basic than that.
What better way to implement that strategy than to locate products for pennies on the dollar, sell them at a significant mark-up, and reap the rewards. If you actively participate in online auctions such as eBay you see this every day.
Brandname software products being offered for unbelievable prices...