New Game Collector

Hello, I'm a avid gamer and just recently got into collecting them. Since I'm new to the whole game collection scene I'm not really sure where to find the best options. I've found one site called LeapTrade and really like that, but I'm wanting to fine site like it so I'm not limited to just one site. The main features from LeapTrade that I like is the ability to talk with other members to "negotiate" prices as well as them having older and newer games. If you know of any other options similar to the features I mentioned please let me know, thanks!