There are several people around the world who are so fascinated about start up businesses. They get an idea from somewhere, or hire a guy with an idea, and work on it, learn the pros and cons, do this do that and build up the company. After a few years the company starts to make profit, and once they take out their investment, they put up the company for sale, and what ever they get out of it will be their profit. Successful ideas will be put up for a great price, and you will be given the manuals of how to go about operating the companies and the innovations that have been tried in the past and stuff. Weaker ideas come at a smaller price, and if your ideas can make the company better, you could buy the company, and develop it, and sell it again after some time.
But where to find buyers and sellers of the company if you want to do such trnasactions? You cant go around company to company asking them if they would be putting up the compnay for sale.
Websites such as Bizag is a portal that lists businesses for sale, which people who are interested to buy new businesses may browse through. Buying businesses for sale is a good idea, as you dont really have to go thru the trouble of establishing things yourself, and you would just need to continue on the footsteps of the poeple who have preceded you and work on their ideas and implement your own and carry things further, and develop the business further. And if you are unsuccessful, you could always come back to bizag and list it again and someone else who thinks that they can do this job better than you would buy out the company and take it further from there.