In the State of Nevada, do I require a business license to sell over the internet?

Answer 1

Ask your local Chamber of Commerce.
That will give you a non-government but still expert answer that knows your local laws

Answer 2

As in any state, it depends on what you're selling. If you are just an individual selling something you don't want anymore...no...

If you are selling new merchandise as a store would, then you are conducting a business and need a business license.