sell the tangible copy. I dont understand selling a prebuy, you dont have it in your hands, what if the place you buy it from cant fill your order, or you bought it off amazon and it arrives smashed up and you have to return it, or some other nonsense happens. Then you are hosed, and you will get some (deserved) negative feedback for not being able to fill your buyer's preorder.
Only sell something you have in your hands, that way you actually have it. Why sell something you dont have in possession? that is asking for trouble.
And yeah i am hoping it comes back in stock at either amazon or gamestop or whatever. Not that i even own a computer or the first Wow game, heh, i will get to that eventually