Here’s an option. Tell them to hold it until you’re ready to have it shipped. They run an auction every month and it’s possible to pick up a few along the year. It’s just a comic book, you really don’t need it in your hand to prove ownership
I second this, and should have remembered to mention this to you myself. I don’t pay super high shipping and have done this (especially since I pay via check, so they often haven’t shipped the last auction’s books by the time the next one starts). They’re very accommodating with these requests.