The redaction is frustrating, but I suspect the approach is still at least partially viable, so they aren't interested in giving a playbook for scammers to exploit.

The tool I bought wasn't what you'd think of as a small, inconsequential item. I'd wager it was ~2lbs and was a automotive brake bleeder in a blowmolded case. Probably the size of an old-timey encyclopedia. Cheaply made of course (almost certainly an aliexpress item). The seller I bought from has what appears to be an aliexpress dropshipping supply chain -- they buy the tool for $, ship from a US warehouse in Florida for $$.