what are the pros and cons listing against existing AISN? I've always used my own upc codes but it gets a little expensive, especially if the account doesn't live long. When I list against and existing AISN will my keywords and title be used for searching? Can I put my own main picture? It looks like I have to use the one i'm listing against. Also I read my item isn't visible all the time only when I get control of the buy box? If I list against existing AISN will all other competitors automatically drop their price if mines the lowest. I don't really understand it. Can someone explain?