Hello and welcome to SaleHoo, Mokasinga :)
Nice to have you with us!
To be sure that I won't miss any vital tips, I will give you the direct links to various guides (blogs) that will help you make your ebay listings literally pop!
Link hidden: Login to view
Link hidden: Login to view
Link hidden: Login to view
Link hidden: Login to view
As for what to sell, research is the key! I know we always say that we should sell something we are passionate about but still I think we should counter check if what we love is what other people, potential customers are looking for.
You can start by using our very own Link hidden: Login to view to help you find your coveted niche.
You might find the links I suggested in another post helpful in your niche hunt.
All the best :) Should you need further assistance please don't hesitate to let us know!