She doesn't look mixed to me, looks all bully. And what a sweet face! Love that you are adopting an older girl, you will fall in love so quick. I believe what she is asking is fair, rescues can charge around that amt too depending on the area, etc. I hope you decide to go through with it, and give her a loving home she deserves. Looks like she's been bred.... time for her to just relax and live the good life. Good Luck!