I had the same sort of thing and suggested the graduate set up a show and just have family and friends order her gifts certificates.... then she could use them when she got to her new home and she wouldn't have to lug PC stuff across country. Plus she would get the host benefits from catalog...
I don't ask host for money for the postage I trade them the page(s) of stamps I used for their invitations for full ones. I just tell them - to make this easy for you I will send your invitations, just get a couple sheets of stamps before the show and the day of the show I will trade you, when...