How to buy badman robots?

Excuse me, I was wondering if you could shed some light on the process of purchasing badman robots. I've heard a lot about them and am quite intrigued, but I'm not entirely sure how to go about acquiring one. Are there any specific steps I need to follow, or is there a dedicated marketplace where I can find them? Additionally, are there any precautions I should take to ensure that I'm making a SAFE and secure transaction? Your insights would be greatly appreciated.