Is it illegal to buy bots?

Excuse me, could you clarify something for me? The topic of buying bots has been on my mind lately, and I'm wondering if it's actually illegal to do so? I've heard conflicting opinions on the matter, and I'm not sure where to stand. Is there a clear-cut answer to this question, or does it depend on the specific bot and its intended use? I would appreciate any insight you can offer on this matter.