Hey there. It appears you're looking for an answer directly from a Savers manager. I doubt you'll get that here. However, I can tell you that they only receive donations. They offer nothing in return for video games like GameStop does. They do give you a receipt for your taxes and a stamped card for discpunts on future purchases in the store.
Taleah Angus is right. There a donation center, not a trade in place.
Thanks! Your answer is awaiting moderation.