Are you sure it even is a morph, cause I would think that if it was, the seller would have told him what morph it is. I have a bp that looks very close in coloring and somewhat close in pattern, and he is just a normal. When he was younger, he was more of a brown color, but as he has aged, he has turned darker like the one you are asking about.

However, it is still a very nice healthy looking animal!