I'm not sure if me making a thread for my newest site is frowned upon or not. If it is, someone let me know and I'll apologize, beg, and remove this. That said:
There are not enough classified sites dedicated to retrogames and video games in general on the internet, so I made my own. It's completely game focused and the plan is to keep it more organized and of a higher quality than craigslist, kijiji and the like.
I've longed for something: organized, collector friendly and free. This is where I ended up - making it myself. Check it out if you're so inclined, give me feedback, join or even sell something.
http://www.GameMonster.org