It is a yacht called Armadillo that actually looks like one but is probably as bullet proof as one too.

It is also a very sharp looking yacht if the yard photo is recent.
$1,800............Looks like a nick to me, but be prepared to spend that much again to get it seaworthy, you know, mechs, elecs, tronics and a bit of shiny stuff.
You will no doubt get around the no key thing, or use it as a bargaining point, or both.