Lol...tell him Grandpa! I think it stands to reason as many trade ins as they take, it's a good possibility they do. Call them. Check their website.
I just wonder how the hell the OP figured that it would be easier to ask at this site vs going to the source. Quite irritating, really.
EB Games may be a franchise, but the stores are owned by individuals and will thusly differ. Call and ask.