Does she exhibit the typical het markers associated with pieds...yes. Does that mean she is het pied? Not necessarily. Add her to your collection, breed her to your homozygous male and figure it out! If they are selling her as a normal, then I can't imagine you would be paying much. Breed her with a pastel or something as well so that way if you don't get any pieds you at least have a chance to get something better than a full clutch of normals.