Personally I wouldn't pay anything over $500 for her. Firstly because you didn't specify what she shows. Shes a solid paint, don't have anything against them, just not for me, and if I'm getting a paint, I'm getting color. Also her conformation isn't the greatest, needs more muscle. And she looks like a choppy mover.
"Doing what you like is freedom, liking what you do is happiness."