I'm sure someone will give you the exact quote but I've heard about $10,000, plus "extra stuff", like a trailer, box, etc.

I've also heard from a very good cat racer, who tried a Moth at his club, it was a real exercise in -swimming- way too tippy I guess, you're too old for that crap anyway Mike! For a lot less you can get a skateboard, go out in the driveway and get hurt!