I have this great idea of building an auction website just like ebay but it is not worldwide. It is for a certain state in my country. It is not actually a very big website but it may be helpful for others to use. We actually have this kind of site here but it really sucks and we hate it. I'm wondering do you need a proper license for this kind of website? Please share your experience if you have been building a website like this before, thanks for reading.