Home business harnessing power of the internet

1 of my friend's friend, he start up a internet business online. He has been onto it for 2 years +. He sell stuff online which he bought it from overseas. Quite a good concept. He trade stuff http://ws74erhol.blogspot.com/. You can check out his website. This is 1 example of you need not have any physical store but you can have your ownline business. No overheads no rental and best of all, his business is by word of mouth. 1 type of passive income