Good morning,
Pricing is so subjective, but it's obvious that this piece is a high-end item. I'm sure you know that many pottery collectors limit themselves to a theme in order to create a cohesive collection, and many choose teapots as their focus. Therefore, you can price a teapot like this quite high.
My main advice to you would be to use the other three photo slots in the listing, to show the detail. Also, use up all your tags (maybe do a search of other high-end teapots to see what they use for tags) to make it easier for serious collectors to find you.
Lovely work, by the way!