I am one of those who are reaping the rewards of selling on eBay. I've been in this online business for quite a while now. Within that span of time, I've struggled to refine everything. Through luck and hard work, however, I have made a fairly good living in recent years. What I do isn't anything fancy. I just list and learn how to add keywords and make my items sell. Fortunately, eBay generously assists sellers like me in that area, so all I have to do is search for help and I can find the details I need on the actual structure of my auction.

Like any other type of business venture, the real challenge is how to make a  full time living off of it. On eBay its balancing your selling, time, your business expenses. By this, you need to make smart decisions to keep your overhead cost low;

You also have to look at the prices of other eBay stores for the same products that you are selling. Analyze how you can do better, like maybe you can sell your items at a lower rate; and more importantly, make sure that you can find enough of these items to make a living. 

Selling something that is readily available for you to purchase and that customers will enthusiastically buy is very important. Actually, the biggest area that eBay sellers struggle with is in finding the source of products to sell. Hence, you need to research on reliable dropship companies as well as wholesale companies and establish business relationship with them.

One of the biggest mistakes that contribute to high overhead cost is to stock up too much on inventory. You may pay lesser for buying in bulk from your supplier, but if the items do not sell fast, you will be burdened by the storage costs and other charges related to your purchase. 

eBay selling can be rewarding. It has ups and down like any other business endeavors. But, if you put your heart into it, learn and adjust for every mistake or success, eBay selling can be a good source of stable income.