Where can I sell my game that I used once?

I bought MLB 2K9 for the Wii and do not like it. Only he once played. Literally new. Where is there a place where I can sell / trade it? Paying a lot for the little-used games? Thank you!

I must tell you, most game stores like GameStop and as you pay a few cents for games even if they are in perfect condition. No joke I sold my games (some of which had never been opened, still in shrink wrap) and I get about $ 2 - $ 8 for them, then I see them for sale on the wall with a previously owned sticker for $ 40. It is better to sell them on Craigslist, Ebay, or post ads in something similar. People will buy something like this for only a little cheaper than full price. (Since even sell used gamestores games for almost full price) I am selling all my games on craigslist now.

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