I have Call of Duty Ghosts, I hate this game so **bleep** much that i have to swear on a Forum. If i sold Call of Duty Ghosts to Gamestop, how much money do you think i will get?
You're better off trying to sell it on Craigslist.
Look up how much they are selling the game used on their website -- then sell it on craigslist for a few dollars cheaper.
EDIT: Just checked for you.
They are selling it used for $54.99.
List it for $50-45 on Craigslist, or ask for a game-for-game trade.
After searching for COD Ghosts on Best Buy's trade in site, you would get $10 in trade-in value.
You might get more from Gamestop, since they are more known for selling used games. But online sources like eBay and Craigslist is also good to try.