I'm so confused. Are you saying that now you won't provide me with evidence unless I throw $300 at you first simply because I bothered to ask for it? Fuck that. Show me proof of COA and I'll buy a key.

And BTW simply selling me a key that activates for now isn't proof of you selling me legitimate keys, they could be stolen via a keylogger or, as I suspect, resold from MSDN/MSDNA accounts.