I personally think that these items are underpriced! When I see beautiful, handcrafted items like this priced so low, I wonder if the quality isn't very good.
I took a look at your store, and I have a few suggestions.
1) Looking at all the pictures for your items, your work is really pretty from the front, but the pictures of the back of the work are not so good. Customers want to know that your construction is good, but from the look of the back of your work, I wouldn't be confident that I'm buying quality. For example, this comb looks like it's glued on with super glue: http://www.etsy.com/listing/57630466/fuchsia-peony-silk-kanzashi-on-comb . That doesn't look professional to me. I would suggest using a different glue or finding some way to hide the glue. I like E-6000 for my work (though I don't know how it would work on cloth). It takes longer to set, but it's waterproof and dries super clear.
2) Photography: Some of your photos are over-exposed, making it hard to tell what the true colors are. Also, use models more! Giving dimensions of your work isn't enough. Customers aren't going to pull out their ruler and try to imagine it on themselves. People need to be able to see it in use! I loved the model shot for this item: http://www.etsy.com/listing/50825029/white-sakura-bridal-silk-kanzashi-comb .