OK so i was wondering how much i can get for all these games for sell at game stop and they don't have case/boxes what ever they are called so they are Just the disk no book or anything else in good condition so here is the list note they are all xbox 360 games Spider Man 3, Fantastic Four Rise of the Silver Surfer, Forza 2 Motor sport,Marvel Ultimate Alliance 1 are much are these all worth and does it have to be in a case and have a booklet can i just hand in the disk would i have enough to buy 1600 microsoft points i want to get the new mythic maps for halo 3will they give me cash or credit that i can use to buy the points and can i use credit with cash together?