I found these pink A pocket sevens on ebay. I have been dying for some forever. What do you think the chances are of these being authentic? Also if they are, what size should I get? I am normally a 6 to 8 in stretch jeans and I usually wear an 8 in trousers at Gap (when they fit) and a 6 in Express Correspondents and a 6 in Editors (when the Editors fit)
I can't help with fit, but I would be personally very happy with her guarantee. You could take them in to the store to make sure they are the real thing, and if not, according to her auction, you can send them back. I would ask her about return shipping costs and original shipping fee's being reembursed in the non-authentic scenario prior to bidding.
I don't have personal experience with these jeans, but I know that everyone says to size up. Based on what you've said about your sizing I think you should probably be ok with the 30. If they're a little big you should be able to have them altered a bit.