Some years ago a business acquaintance did look seriously into the issue of having a person in our industry removed with extreme prejudice (no tears would have been shed by anyone), apparently the going cost was about £5k, but this did include a return flight to Venezuela and a three nights in a London hotel, he wanted a connection as to where to acquire a 'hot' scooter and a pistol, if was to use a knife the cost was I think another £100.
What was worrying was just how easy it is to arrange.
End result was he decided not to go ahead with the order, but the word got out and back to the person involved.
I believe he is still practising in our industry, as several ex staff members still work locally but I've not heard his name mentioned in at least 5 years, he now keeps a very low profile,
and no longer goes after people, I'd assume that he had a very pointed lesson.