eBay

One of the largest online marketplaces makes it a piece of cake to get your own business going. You can open an account and start making money within hours on eBay!
While I dislike that whole "sell your garbage on eBay" thing, there is some validity to it as many people get their start on eBay by selling items from their garage or attic that pre-eBay would have been thrown out. This approach is fine, but where is the business once you run out of those items? If you want to create an eBay business that doesn't require tons of time and effort, you need to leverage products that can be sold over and over again.
This is one of the reasons I'm not a fan of the "eBay seller for hire" kinds of opportunities, where you sell things on eBay for other people. You get access to stuff people want to sell, but because each item is unique you have to work to list each and every one. There's no leverage there!
Take a look at some of the largest eBay PowerSellers and notice how they specialize in very specific products (iPods, cell phones, dog grooming kits, etc.). This allows them to leverage their efforts. A listing is created once, and money is collected over and over again.
Unlike information marketing, this business requires the handling of physical goods, but even that can be automated, so it shouldn't prevent you from considering this idea.