Boxer dog female - $100 (Bemidji)

Purebred boxer White in color.
About 6years old.
Spayed but not up to date on shots.
Looking to rehome because we don’t have a safe place for her to get away from our toddler and she is starting to get fed up (growling and nipping) with the kid being around her all the time.
We don’t feel it’s fair to her to keep her locked up or outside all the time to keep the kid safe.
She is a very sweet cuddly dog but is getting a little old and stiff (I’m thinking this is causing her intolerance with kids) .
Would like to find her a forever home without small children that don’t grasp the concept of giving a dog space, she would be fine with anyone else and gets along with cats and other dogs.
$100 rehoming fee to insure she is going to a good home, I’m willing to negotiate with this as long as we feel like you’re the right fit.