There is one for sale at this marina:
Point Roberts Marina - Point Roberts, Washington 98281
It is on the same dock as mine and I drool everytime I walk past.
The owners say it does not go as fast as I thought it would and they don't seem to enjoy it like I would. If I had the $$$ I would have made them an offer by now. I quite like it. I think they are in some sort of joint ownership and want out of it.