I have a cautionary tale. I decided to buy a cloak of invisibility, similar to the one that Harry Potter had, so I could snoop on my wife. I found a vendor that was selling them on the darknet and it was expensive. I bought a cloak and it arrived five days later. Apparently I dropped it when I was opening the box. It was invisible so I couldn't find it. I emailed the vendor, but they wouldn't refund my money unless I returned the product. I was totally bummed.
