This is a popular question, asked especially by those who are just starting out in their online business. Unfortunately, there doesn't seem to be a fixed answer to this. Google this phrase and you'll get a list of search results that seem to be answers. Read on, and you'll likely discover that there aren't ANY definite answers. You'll probably get ideas and suggestions on what you CAN sell online, but no one shows you solid proof on the returns you can expect to get.
Of course, if you...