Used PC Games

I was wondering where I can sell used PC Games online? Is it possible to do this considering that all games come with a code you have to enter in. If I do sell it to someone will they be able to play it even though I have used the code and played the game already. I have the a bunch of Sims 2 games I want to sell. And wanted to know if you all know any information on selling used PC games with codes.
Answer #1
If the game registers its code on the machine [ie offline] yeh I would think this would be ok
Sims 2 should work yes
Answer #2
So even though I used the registration code that comes with the Sims 2 games and expansion packs I have I can sell it to someone on e-bay and they can use it just fine.
Answer #3
it depends on the game, single player games can be sold and reinstalled using the same key to play.
most multilayer games the key is connected to your account and the buyer will get a message saying key already used or something.
Answer #4
you can sell on play.com
Here is the link to sell ‘Sims 2’ http://www.play.com/Games/PC/4-/120244/The-Sims-2/Product.html
Answer #5
Selling used PC Games???
better go for console games!! No Key needed for mp, just the disc
Answer #6
It hurts consumers that want to play online or require activation such as Crisis Warhead.