The very first thing that eBay founder, Piere Omidyar sold online was a broken laser pointer. Amazed that it sold for $14.83, he contacted the winning bidder to confirm that he is aware that the item is broken.
"I'm a collector of broken laser pointers," was the buyer's reply. (http://ebay.about.com/od/ebaylifestyle/a/el_history.htm
And that was how eBay started.
If you have stuff lying around the house that you find no use of, why not sell them on eBay or online. I always advise those who are new to online selling or those who are looking for things to sell to start by selling stuff from home. This way you will get your feet wet without much risk as it doesn't require a start up capital. This is also a good way of finding out what sells well and what you buy more of to resell. Then, you can move on to buying wholesale lots and when you're ready, you can source volumes through liquidators or direct from the manufacturers. I know that this doesn't happen overnight and it won't be that easy. It takes time, a lot of effort and money, too but if you start now, you might get there sooner than you think!
I wish you all the best!