Is it illegal just to have a onion site running in the first place? That would be a cool thing to try but I am scared to dabble in that stuff.
I don't think it is at all illegal to run an onion site as long as it is legal. There are legitimate websites that run mirrors on tor without facing any prosecution.
there are allot of darkmarketplaces where you can buy almost anything but you have to be careful because there are allot of people who get rid of their coins because the market has fake things that some people bought.