Take pictures of the heat stamp (reads Louis Vuitton made in _____) and the date code which should be in an inner pocket.
When you do though, post the pictures in this thread:
So more people can help you.
But its not mine lol
But do you think its real or not?
Then ask the seller (or owner) for more pictures. There's really no way to tell from the pictures you've provided.
For future reference, please post all authenticity questions in the "Authenticate This Louis Vuitton" sticky undet the "Louis Vuitton Shopping" section. Thanks!