Something Signed by Ayn Rand?

I really want to get a signed copy of atlas shrugged by Ayn rand, but, I do not have 21 thousand dollar, and I have the oddest feeling I won't be acquiring it any time soon. So, my question is, where do you think I could find a legitimate place to get something else, like a photograph, of her signed? I still realize it will cost a lot.. But lowering the 20 thousand at all will help.