Be careful drop-shipping is not to be taken lightly. Especially if you are going to sell on a marketplace like eBay or Amazon. We run a full-service Online Seller Program for Amazon FBA Sellers and to be honest would never even consider drop-shipping. We've seen customers have horrific results. I would advise you look for services like ours to be safer.
As a brand owner that provides drop shipping. My advice is to do your research and contact suppliers that you are interested in doing business with, ask questions about the inventory they offer as well as their policies.