If you don't like the price, then find another source. If it's just for breeders to breed feeders for your snakes, then you don't care whether they carry albino genes or not.
If no one in that area has ASFs then that might be a great price, if there is a lot of suppliers, then it's high. But I still wouldn't call it a "rip-off". It's her rats, and if she wants to put a $100 price per rat, it's her call.
I'd check around and see if someone else might have live ASF nearby cheaper.