When I e-mailed posterstoreusa and asked about these posters, aside from being rude and condescending regarding my question in his e-mail by saying that if I can't tell how to spot a fake I shouldn't buy them, he said that he only had one set left... then I received an e-mail from him stating that the winning bidder was a known bad buyer and that he would be relisting his posters which he apparently did several weeks later.
Bottom line, I don't trust him. He uses SEVERAL aliases including ezpostershopper_com on ebay. I made the mistake of buying a Dark Knight style B poster from that alias which he sent with fingernail indentations from rolling, then said he would send a replacement, then told me to file an "item not as received" dispute with ebay, then refunded my payment, then sent me a payment request for the replacement poster. I didn't bother.
No way would I ever deal with this guy again. I don't trust him.