Not many people selling speed boats. So your buyer potential is low which means it's possible no-one will find the name to buy it.
You'll possibly have to reach out to already established boating companies with this one, and see if they're interested as a 2nd or collectors name.
I can see $xx easily as good keywords, but as johname said, there are other names available for reg fee which are no better or worse (doesn't mean a buyer won't like yours and pay for it though).