After seeing the description officially on their website, I purchased what they described and advertised as an "offprint" of this article/paper from the journal Science. I ONLY bought it because it was an "offprint" which is what I was seeking. What they sent me was what is officially called an 'extract' of that article which is basically where the articles is cut out at the edges from the spine of the journal and paper clipped or stapled and sold like that. There is a major difference in an offprint versus and extract, because an offprint is a separate reprint (offprint) of the article made at the printers office with what is called the original 'wrappers' or 'covers' to the layman. Offprints are always more costly and much more coveted by collectors since they are an official separate entity that is printed of the original paper by the printer. Thus this item was grossly misrepresented in their description. My reason for writing this, is that I had asked them that it would only be fair to the customer (me), for them to reimburse me for the return shipping of the item to them, since once they got it back they could confirm that their original description was grossly flawed and misrepresented. I did NOT get reimbursed on my return fees to them even though this was returned to them ONLY because what they sent me was not what I 'thought' I was truly buying. They did not have the dignity to accept that they made a mistake that ANYBODY else could have made including me.