You can upload pictures of your Marketplace products by going to the Products tab in Your Account. This allows you to visually present your products with a personal touch and increase the buyer’s experience.
On the Products page you must and select Marketplace from the navigation at the top.
Click on the small icon below the image thumbnail “Upload gallery picture”. The gallery image should be a pixel graphic (.jpg., .png or .gif), at least 600 x 600 pixels and no larger than 2 MB.
Your gallery picture is shown on the detail page of your Marketplace product. You can also find a complete overview of your gallery images in your user area.