Two questions:
1. How do you intend to get around the terms-of-use violations for most of these MMOs that explicitly state that buying in-game currency is forbidden? I honestly have only played WoW from that whole list, so I'm not much of a gamer myself, but I know that Blizzard at least is very aggressive in making these sorts of things difficult, or at least a bannable offense if caught. Especially for selling whole accounts.
2. Why do your two earliest "testimonials" sound like generic eBay feedback comments? Quoting this in case it changes:
Testimonials
Eric Chapin
Bought an account from someone who bought an account off of mmoclub and was able to retrive the secret question and password from him awesome fast and trustworty thank you very much!!
Dylan Gwynne
Very Very good experience dealing with them. Will gladly do it again as they are very legit and very quick. No hassle and now back to gaming^^
David Block
Thanks for being such a great Middleman and helping me sell my account. Service was wonderful.
Michael Patterson
bought an account from mmoclub. Quick smooth transaction with no problems. a++
Junaid Nadat
bought 15m great trade thanks

If you're legit then it's a good service, but please forgive me for being slightly wary of it to begin with.