Jim lee sketches and artwork question

Hi guys I have been looking to aquire an original piece of artwork from Jim lee whether its a sketch or comission have been looking through eBay and have found a few what would be some good Pointers or advice on locating an authentic one let me know thank you i posted some pictures below of some i have seen on ebay which ones would you say are real or fake?

Could try Albert Moy he sells many storyboards of from big artists and sometimes when artists get commissioned they do rough sketches that he sells. One thing I will warn you is Albert is a huge douche bag and will try to make you feel like a nobody.