They look like het pied markers, for sure. However, I'd be willing to bet that this person knows it's normal and just happened to notice the belly looks het-pied-ish and thought they could get away with selling it for more. The fact that she's saying the guy she got it from didn't say anything about parentage makes me suspicious that she's just gonna play dumb when you find out it isn't het pied after all. If a breeder was aware that pied genes had anything at all to do with the clutch and saw the train-track-marks, there's no way they would just accidentally fail to mention it and sell it to somebody for normal price. If you want to gamble, go ahead, but be aware that you might be paying 80 bucks for a normal snake.