I agree with Brianna. Go for Phi Beta Kappa. The outfit that contacted you sounds like its trying too hard. I never remember having to pay to get into an honor society. Of course, I went to school with the dinosaurs, so maybe things have changed. I did get a letter from MENSA once (shows how misguided THEY are) telling me I qualified to join and just to send my yearly dues right along. I ignored it, since they had obviously made an egregious error of some sort, and I'm not into that type of elitism, anyhow.