If your product images are showing as a generic polaroid image in the Gallery View on eBay (see below) then it usually means that the image is in a CMYK format. eBay doesn’t support images saved in the CMYK format so the image will need to be converted to RGB format.
To convert an image from CMYK to RGB, you can use tools such as Photoshop or http://www.cmyk2rgb.com.
More information on eBay picture guidelines can be found here.
