Ok, I'll give it a crack. :)
First impressions - you need a banner and more of a welcome message than your tag line. I want to be able to know exactly what it is that you're selling by just reading the heading. I had to go through your listings to figure out you sell vintage dresses.
Second, I'd work on your pictures. They're really dark. Can you try for a lighter background? I like how many you have and that you show the details. As a buyer I would feel like you used the photos well to show the features. They're just a little dark. :) And pay attention to what's in the background. Personally, I don't like seeing kitchen floors, door jams or seeing a product displayed on a couch. I know yours aren't, that's just a pet peeve of mine. lol
Third, you need an about page. As a buyer, I want to know about you and your shop! :)
I hope that helps and good luck! :) :) :)
