I got mine from ebay, but got the bow from http://www.kotosandmore.com/ I can't remember my price, because it was from ebay. I got stalled on my adventure because I didn't have the correct rosin and because a few of my friends were really put off by the idea of where the leather for the instrument came from.

What I did learn I wrote up here: http://web.mit.edu/cat/www/kokyu/

I would sell it if I weren't afraid of shipping it with the delicate leather. I've picked up the koto, which I can actually find a teacher for and I don't have to make people uncomfortable with what it's made out of.

I'm happy to try to answer questions for you, but I'm afraid I'm not much of an authority.