UPDATE 13.9.: SOLD!
Just joined here which naturally should trigger your alarms.
BUT I have positive feedback (100%) on EpicNPC.com. Added link to THIS post on there as well so you can actually see it's the same person.
WTS: Hearthstone BETA key (EU)
Just got the mail yesterday, unused key naturally.
Accepting: Paypal (verified WITH address, payment as GIFT to Friends & Family)
Bitcoin (you naturally transfer first)
SEPA (European bank transfer)