I have "rescued" many an Alpha Phi pin from E-bay. UGH! I have, in fact, spent a great deal of money on these rescue efforts. I ardently believe that our pins should be kept "in the family."
My advice is: keep checking E-bay. They come up all the time. You have to be willing to bid, bid, bid (and sometimes high). Hang in there and I am sure you'll eventually get one. E-mail others who are bidding. Hopefully they are Alpha Phi sisters too, who will be willing to let you have it. I know there are many out there who are trying just as hard as I am to outbid collectors. I would never outbid an Alpha Phi sister though.
Hope that helps.
Jen