I've heard it rumored that legacies don't matter at UVA. (IDK whether this is true or not. It sounds unlikely, but there may not be a space on the application that asks the question. Easy enough to check online.) Donating a few $ each year will establish an ongoing relationship with the school and make them take a look. I would do it. Every little bit helps. DC may not choose to go there or even to apply, but to keep that option available, if it helps, I would. In the worst case, you are supporting a school which helped you and DH get your educations, which isn't a bad thing, right?