I've been apart of Sythe for awhile now. While there is plenty of options for game, account, gold, and misc trading available, there is also a good spot for community envolvement. You can participate in events, giveaways and even game achievement logs to keep track of your progress. It's not a perfect site but it's fun and if you take your time with the marketplace you can buy/sell/trade in the market with ease and cheaper than other gaming sites.
Sythe, Sell & Trade Game Items