How much are all these games and xbox worth at ebgames or gamestop??

Because trade-in values change a little based on on area/location, you aren't going to get a definite answer unless you take them in and let them appraise it for you. If there aren't any scratches on the games, then you are looking at $50 to $70 worth of in-store credits. The sports and older games like Halo and Fusion Frenzy just aren't worth very much. The X-Box itself has a trade in value of $20-$35 and the other games are common so they will be worth $1-$5 apiece.