Ok, basically saw a craigslist ad. Guy says he bought a box of 100 paper, but the wrong type. Never opened, and recently purchased. He has the receipt, box is apparently still factory sealed, and he has only had the paper for about a month. He is asking $55 for the box, reason being the photoshop won't allow him to return it. This seems like a good deal, as long as it's not opened...right? I mean it is the correct type I need, I'll be picking up in person, so can inspect the seals and such. My only real worry is how hard is it to screw up print paper without opening the box? Thoughts? Opinions? Recommendations? Please if you have any experience buying potentially questionable paper, feel free to comment. Also is there a way to test the paper at all, ie without being in a darkroom and actually printing with it?