Anyone know of other MMO sites?

People always say to me 'I have vouches on another site', but where are these other sites? Google doesn't help me haha. I'd just like to scout other Buy/Sell forums (I'm Neopets only) so I was wondering if anyone knew where else I could look? Sythe is by far my most trusted source for things however I'd like more of an option of goods. ^^ Thanks in advance for any help.