you need atleast one example of your work to open a shop.
Please read the Graphics Markerplace Rules Here
Quote:
All graphic services must provide at least 1 example image. This could be an example thread layout, an avatar, a signature, etc. However, if you are providing free services it is not a must but it is still strongly recommended.
Please take a moment and add a example of your work here. If you dont know how to post pictures on the forums click here