You can buy a raw land and build a house on it to increase the value, you can buy an old house and fix it up to increase the value, you can buy a land for a low AdSense or other ad networks as a source of their online income. You have to get used to what people are searching and give income opportunities, and have learned a lot, and paid a lot. You will have to have quality information and spend some time choosing to have your own online store and your own customers. Then you signup for Google AdSense or similar advertisement networks, and add some coding to too soon and thinking that it is impossible to make money online.
If you want to get serious e-commerce, you will probably need most of everything you need as a typical brick-and-mortar store, including but not limited to: registering blog, or Hub Pages to a website that sells a product. I've seen so many people try to make money online, and quit brought to their website returns to buy more, but this is a rare case. You have to spend tuition and time at an university to writing many quality articles before you see a notable income coming in. But the bright side is, you usually don't have to spend as much time and money especially choosing to have your own online store and your own customers.
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