Hello! It actually appeared in Closet Child on the day you asked this question. o.O Freakeh.
It was snapped up immediately though, I’m afraid. I can’t say the price for sure. The most expensive dress I’ve ever seen in CC was just under 40,000 yen, but a friend said she saw one priced at 66,000 yen once. Usually the popular ones are around 32,800 yen. :)