Miramax Films is auctioning off various props and costumes on eBay, with 100% of the proceeds going to charity. They do have some neat stuff, like weapons from The Gangs of New York. Those are going for $100+. If you're more on a budget, you might be interested in [pictured] document folders carried at some point by Meg Ryan in Kate and Leopold. (Yet another movie I haven't seen.)
You're thinking -- sure, they're probably stunt folders or something that they picked up at Office Depot. No, Sir! They come with a Certificate of Authenticity, so that is your guarantee that Meg Ryan at least held them -- however briefly -- in her hot little movie star hands. And you can't just walk off with treasures like that. Unless you're willing to trump the current bid of $0.99.
Though I would easily pay twice that for a phone call where she reprised her faux-orgasm scene from When Harry Met Sally.
So go on, have a look. Bidding ends on many of the items in a day or two -- if you're into collecting movie memorabilia, there are more than a few bargains to be had.