Some webmasters make their money with CPM or CPC advertising. A few step up to CPA affiliate programs. An even smaller number step up to the greater challenge, and greater rewards, of sourcing products from wholesalers and selling them as web retailers.
One of the difficulties in becoming a web retailer is finding wholesalers to work with.
There are a couple of web sites which make this a lot easier. These are directories of wholesale companies, many of which will drop-ship products directly to the end-user.
The web sites are Salehoo and Alibaba.
If you're ready to step up to the next level of e-commerce, check them out!