I got a key directly from Blizzard during the beta wave last Thursday. My understanding is that a key is a key and that it should work for either NA/US or EU.
I'm looking to sell it for $200 through Western Union or Moneygram. I will not use PayPal personally as I had issues in the past with chargebacks (but I am OK using pr3cious as a middleman... you can pay his fee via PayPal and my amount via WU/Moneygram). I will also not share my bank account information, so the payment must be through the instant service.
If you'd rather not use a middleman, I will do whatever you'd like within reason to prove that the key is valid, including attaching it to a new b.net account and streaming it if you don't mind having a new account.
PM me here or Skype me at potato(dot)taco(dot)99 (replace the (dot)s with periods) if you are interested.
Thanks