Signed Gretchen Wilson Little Souls Doll, how much is it worth?

I have a Gretchen Wilson Little Souls Doll called Mary Frances. She has a certificate attached to her that says she is # 21 out of 500, and that it is an original work by Gretchen Wilson. It is also signed. I've seen some of her dolls on ebay for $150+, how much do you think this one is worth?
0