If there is an item that is illegal to possess, typically both the buyer and seller can be prosecuted. That's nothing new. You're just continuing to push the idea that "it is legal in my country" as a defense that's already been established as not a valid defense. This type of prosecution has been established way before the internet even existed.
Well, the legal system's that state that buying and/or selling a restricted or illegal item is punishable by law. I'm not familiar with the laws of every jurisdiction on the planet in this particular manner.
I'll admit I'm assuming that in cases where it is illegal to possess the item it is also likely illegal to sell said item. But I'm sure there are exceptions to the rule.
