Hi all, i am looking forward to buy at least 2 power adapters for my 15" rMBP. I realize I need to buy the genuine one, hence this question.. Whats a good source to buy OEM or bulk packaging based 85W MagSafe 2 Power Adapter's? I was looking at MacMall, they have it for 54 bucks.. is it a good source? are they genuine? Another option i see a few OEM ones here.. for 34 bucks.. not sure if they are genuine and can be trusted. http://www.gainsaver.com/Catalog/Detail.aspx?&cICode=169274 Ebay has quite a lot of them for around 45 bucks.. sellers claim they are 100% genuine, although i won't go by their words.. they wouldn't know either the source is genuine or from a dup source.