My club has a trailer for a Twin Astir that could well attract death
threats. I've certainly felt like doing bodily harm to the guy that
built it whenever I have to use it.

Seriously though, this is the first time I've heard of this particular
scam. I've seen quite a few advance fee fraud attempts when selling
two of our club gliders but never this. I suppose that as the scammer
is saying that someone else tried to hire him to kill you he's not
really making an actual death threat which is why the F.B.I. told mike
to just ignore it.