Depending on how badly and how soon I want to sell a horse, I price it accordingly. So, for a horse like yours that I was enjoying riding and in no rush to sell, I'd keep working on her and get her show ring ready and stick a price tag of say, $4500 obo or firm, depending on how you feel about her. I took a year to sell a gorgeous gelding who was dead green when I got him but utterly sensible. I was in no hurry to get rid of him so I stuck him on my web page at $5000 firm and waited for the right buyer. In the meantime, we did trails 3 or 4 times/week, rode in a Christmas parade, St Paddy's day parade, 4th of July Parade and tried mounted shooting, all of which he was amazing and calm at. When the right buyer came along, there was no arguing, $5K was handed over so quick and they still write me and send me pics of their little girl on her horse. He takes amazing care of her.
If I needed to move her, then $2500 obo or less and move her out quick, she's going to be a nice horse for someone.