Here, I found this. Maybe it will help a little ?
If you sell stuff online, most of the time you'll need a "certificate of resale," but you don't need one for Ebay. You need other licenses for services other than selling.
Here:
http://www.trainingu4auctions.com/_g...iness_license/ they tell you that EBay does not require a license.
You do not need a business license to sell on eBay. However, as you may have already learned from my books "eBay Business at Your Fingertips", “eBay Rescue Problem Solver” and “eBay Rescue Profit maker,” you cannot be a serious seller on eBay until you have a business license.
There are many good reasons for an eBay seller to become a bona fide business and obtain a business license. The primary reason is so you can deal directly with distributors and wholesalers. The first question they will ask when you apply to be one of their dealers is, “What is your EIN tax number?” If you do not have a tax number, they will not sell to you and your new eBay venture is stalled. You obtain your EIN tax number with a business license. So let’s get you legal and licensed as easily and inexpensively as possible.
Contrary to popular belief, a business license is fairly easy and inexpensive to obtain if you know where, what and how to file all the required forms. Best of all, you do not need to pay expensive attorney fees.
Most small businesses are Sole Proprietorships, Partnerships or the increasingly popular Limited Liability Corporations (LLC). The key to making the decision as to which type of business is right for you is based mostly on minimizing your taxes. Note that Sole Proprietorships are usually taxed about 15% higher than the other types of businesses. An LLC business provides you with security (separating your business liabilities from your personal assets), minimizes paperwork compared with an S or C Corporation, and the profits transfer directly to your personal income for much easier tax preparation.
Almost all eBay sellers that I know, are now choosing to become LLCs.