@Hannah Smith- I think the main thing you should work on if your pictures, they dont "pop" and look washed out and grey. If you use a grey I would go with something darker, either that or go with white and use a program to edit the pics. I would also work on setting up your dolls better, maybe a prop to hold them up and take pictures of all the angles (the one with the girl holding them is really cute though!)
As for prices I would just make sure your making profit, calculate the cost of labor,materials etc :)
@Kelly I personally use a dark grey and white backgrounds depending on the item itself. You should work on choosing a background that works best for the item for example this item-
http://www.etsy.com/listing/89664128/adorable-mini-top-hat-black-with-hotwould look best on a white/light background as the item is black and blends in with the black background.
I would keep prices with a nice clean number such as 17.00 instead of 16.99. Have you looked around to see what others price similar items at? If not look into calculating the price yourself based on how much you want to make and dont forget about the fees (check other thread "general pricing tips") for more info.