Well, that's the trick, isn't it?
We're in a low-demand/high-saturation market. I've diversified to offer useful office items, and that's helped some. Make sure your shop is top notch: great pictures, dynamic descriptions, titles/tags/etc., shop policies, etc. Make a quality product and stand behind it. Provide great customer service. Market off Etsy.
Finally, you've got to build a following, which takes time.
Your images look good to me. Your prices are about right (a little on the low side, but still right in the ballpark IMHO). Stick with it. Good luck.