That bike's been vaporware for a long time, even more so than the new Nortons. Last I heard, Bernard Li was still looking for investors in order to start production and actually get a bike on the market. I've read that there's also some question about his engine-supply deal with Honda, since the RC51 has been rumored several times to be going out of production.
It's a nice bike, if it ever makes it to market, but the supposed price of over $20k is a bit rich.
And as far as modern-day "Vincents" go, I'd much rather have
this one:
--mark