From all the gold sellors I've tried, this one is rly the best out there. Here's the list:
1) It's a German server, so the Online Help speaks English pretty well.
2) When you ask them for stock, they will never lie to you. Yes they even tell you if they don't have any stock.
3) They will deliver as told. If they say they have stock, they will login directly and trade with you. No stupid excuses like "we got banned etc etc". You can even stay in chat with them untill they delivered.
4) The downside is that they're not the cheapest out there. But I rather pay few more dollars then dealing with some non-english speaking chinese guy that for some reason always get banned the moment you placed your order.