I agree with everyone who said NOPE! Not for free, no thank you. Been there, done that myself in the past, and nothing came out of it. Just gave away some products, that's all.
This woman sounds like she has some serious nerve! To ask for an item for free, fine... I've been asked quite a bit, I think that's normal (not that they should, but they do...). But to request a specific color for her daughter??? And when you said, sure only $8, she said no???? Dang, that was a good deal!!!
I'd politely decline. :)