You mention selling on this site, you mean CF?
If that's how they initially sent you a message, then you could report the username to admin.
I'm active duty Army right now. Aside from the obvious scam of the message, interesting they tried identifying themselves as being at a military base, while deployed. I've been deployed myself where an incident would occur that would cause outside communications
to be shut down for a while, but usually didn't last long. an E3 isn't going to be making much money
to try buying
a boat, let alone one at 41'.
Just makes it sound like there's some sort of hardship when it comes to communicating or paying. While the person tries, he fails badly.
In my earliest deployments, contact with the outside world was very limited, but we've now been established in many places long enough that communications
are fairly reliable. So for a legitimate buyer, coordinating a funds transfer of any type wouldn't be too difficult.