Running an eBay business is a smart decision. It could be quite profitable for you. However, if you feel like you are not making enough sales, there are several tips you should consider following.
The first thing you should start doing is including the link to your eBay store on various social media sites.  If you are a member of any forums, include the link to your store in your signature as well. Even though you are selling products on eBay, it is still important to market yourself. Create a page on social media that shows off the products you are selling and then let people know where they can go to buy them, which would be your eBay page.
While creating your listings, try to optimize them a bit. Use keywords that people are using to search for the kinds of products you are selling. Creative a compelling description for each product that explains what it is, how it works and what makes it the best for the customer. 
It would also be a great idea to take a look at what your competition is offering. After all, you want to get ahead of them, so offering greater deals may help you get the advantage that you need to make the sales. I know some people prefer to bid on items, but you may worry that you will not sell the items for what they are worth. It’s always worth a shot, but if it is causing you to lose out on money, the Buy It Now option may be a bit more feasible for you.
I've included an infographic that you may find interesting as well: