100000000000% positive its a norm. Definitely get your money back. I was thinking maybe you misunderstood the owner. How large is that snake and female I assume I will go back and read right now. But if thats a female norm for that size then maybe 150 isnt bad...well for a petshop price. Maybe he meant if you breed that to your ivory then you will produce yellowbellies. I know I have selective hearing and I can see where someone could think that meant it was a yb. Just a thought.