Good for you! There isn't that much of a requirement so long as you follow their policies on how to list items, you should have no trouble at all. With regards to selling brand name perfumes, you don't really need to get a license or anything of the sort. But do make sure that you are selling authentic brand name products. eBay is quite strict with regards to listing imitations and fakes. So make sure you've got the necessary documents to prove your products authenticity.
Also best to familiarize yourself with their rules and policies, so you'll know the do's and don'ts:Link hidden: Login to viewLink hidden: Login to view
Hope this helps - All the best! :)