Your "reward" for helping them is a copy of the new product. Well, that doesn't cut it. If I have cherished these games all these years and they value it at one copy of their new product they can forget it.
They wanted a copy and not your original disk. How can you value a copy of a disk that much?
I would happily help if i still had any of these games.
I think they deserve some help, considering they also released their classic games for free.