I wouldn't even worry about the OG part. As good and healthy as she looks in that pic, you are getting a great deal for a female pastel! If she were near me, I would have had her in a heartbeat, probably even for $200 (or more?)!
But do make sure she is healthy and do your best to make sure she is the one in the picture! Congratulations! Wish my first BP would have been an awesome morph like that!