There should be a button near the seller's name/info that says 'become a fan'. If you want to follow that person, that's what you click on. As for the GIN, since there have been bids placed, its not an option. On the auctions that I have currently, I didn't set a gin amount, because I don't get paid for another few days. I set them up this way so that I can make sure I can get the item to the winner asap...If you have any more questions, feel free to ask!