Like others said. Post your location. Post in local FS clubs. Post in the club of the game that you want. We all started where you are now. I've bought and sold quite a few games through this marketplace, having games shipped, driving 12 hour one ways to get a game I wanted. It's all part of it. The majority of our community are great people.
If an Ad doesn't provide the detail you want, maybe you are looking at the wrong seller anyway. Somebody who post 2 blurry pictures and no details isn't someone I'd buy from. Regardless of how much I want the game. Be a little more selective in your choosing as I'm sure those who are selling games are selective in who they are selling to. Just because the game you want is on the marketplace, doesn't mean that transaction is a good fit for you. Many of them won't be.