i saw in some mobiles available with VGA camera , some digital camera, some 1 or 1.3 mega pixel camera ..... what are the differences among them

http://cgi.ebay.co.uk/7-x-LCD-SCREEN-PROTECTOR-GUARD-for-Samsung-S3650-Genio_W0QQitemZ170404788000QQcmdZViewItemQQptZUK_MobilePhones_MobilePhonesCasesPouches?hash=item27aceab720#rpdId I don't know whether it's safe, i've never used ebay before. so please could you tell me whether it's safe to purchase the item?

I have an item which broke, and although I am able to return it (there is a warranty) I want to avoid the crap I will indefinately get from any sales rep on returning and just get in and out of the store instead of spending half an hour in there. The broken part is a damaged LCD screen which is almost entirely black and a little dent on the panel around the screen. It is not major damage and barely visible if not seen directly from the front. How can I hide the damage?