Selling games is new to many so here is a list of conditions that you have to consider.

The game you want to sell has to meet these conditions:

1. The game has to be a tradable game gift in your inventory (next to the trading cards). You cannot sell games that are in your library. Once a game is in your library, it can never be turned back into a tradable game again.
2. The game gift must have no regional restrictions at all, i.e. it has to be activatable in every country in the world.
3. The game or bundle must still be available on Steam in the same form. You can recognize removed games by their generic gray "Steam Gift" logo.
4. The game must be listed in our list of accepted games
5. The game must be below the stock limit (part of the bar green in the list of accepted games) (we only buy a certain amount per game to prevent abuse and overstocking)

Your Steam Account has to meet these conditions:

1. Public profile (see How do I make my steam gift inventory public? )
2. Uncheck "Keep your Steam Gift inventory private" in inventory privacy settings (see How do I make my steam gift inventory public? )
3. No trade holds when you trade (see It keeps saying that it will result in an escrow when I have everything activated! )

If you fullfill these conditions and still have problems, please ask for help on the forums or on live support.