Green broke horses just aren't terribly marketable right now, at least not in my neck of the woods.
A dead broke, rock solid, reliable trail horse with no soundness issues is around $2500.; which I think is a crying shame. Most people will have way more than that in a horse before they get it to that stage of training.
Your girl is cute and flashy, which is a plus. It's usually easier to sell color.
You don't mention her size, a horse up to carrying weight will usually birng more. Anything 15.3 - 16 H and up you can get a little more for.
So my real answer to your question is right now she's worth between free to a good home and $500. Sorry, that's the market right now. Finished and rock solid broke with no holes in her training and no "buts" as in but doesn't load, but doesn't go in front, but isn't good for the farrier. $2500 - $3500 depending on her size, how well she gaits, etc.