An original copy of the Die Another Day teaser poster is for sale on eBay. It's only been at auction for two days, however, it's also ready received 4 bids and hit a price of US $43.00.
Is it worth that price or more? Well it's hard to say. It is an original and may be hard to come by once the full poster is released. However, I suspect we'll see a few more on eBay before that time.