Iluvlouies

Hello all,
I won this item on ebay and I am not wondering what can I do to find out if it is authentic. The link is below. I am afraid that I might have just bougt a fake because of the price. I was looking for this bag and when I finally found it, I jumped on it. The seller claimed they are selling it for a friend and that it is authentic. I wrote back about a complete refund if it is found to be a fake and the seller said that they should have had the item authenticated before posting instead of taking the friends word. Please help!