It was possible before ebay got greedy and their customer service got worse. Now I doubt it, the established sellers quite often sell at a loss on ebay to drive sales to their shop away from ebay. This is common practice, advertising. If you are competing with this and fakes it is very difficult to get to that point.
Especially as other sellers will often report yours listings as fakes to try and get you banned (with ebay it can take upto 2 weeks to get your position reinstated) or copy your listings and con bidders. Once you fight this battle, have an account in good standing, get to powerseller status, phone support etc, it runs a little smoother. Youf eel confident and start positioning your company for expansion then overnight ebay change the rules, you can no longer sell this product, there is no longer a category for ths product, they are no longer showing your product on alternaive searches, on international sites, you are now only allowed to take paypal, your items are in the wrong category so you have to change them all, royal mail have upped the prices etc. It is such a shaky ground to establish a business, the goal posts are always changed and they can pull the rug from under you any minute. It gets harder and harder every month to retain the profit margin you bought stock on in the first place so you are reluctant to buy large quantites as the game could change tomorrow.
Ebay are making it pretty impossible for people to become millionaries now as sellers can no longer rely on a future or strategise for expansion effectively. Their practices will eventually be their downfall, it is happening already. There is just not the right competitor out there with the right objectives, money and market control to take them on currently.
I intend to change this for the digital market offering a supportive and fair environment for people to create a business, I am open to working with a cooperation to do this for physical products if anyone has the skills or money and desire to take on the challenge. It won't be easy, there won't be a quick return, but there is a need and a demand for this kind of set up and it is currently not being fulfilled with a truely win win attitude.