Nearly 7-year-old Paint mare for sale

I am offering my nearly 7-year-old, approximately 1.56 m tall Paint cross mare for sale. A trade for a sleeping pill is also possible.  
I have owned her for 5 years. She was lightly backed at 4 years old, working in walk and trot without a bit. We have also cantered, but she is a bit too quick for me, so I stopped doing that.  
She is alert, friendly, not mean, but easily distracted.  
Since I only want to ride her leisurely in the field, we unfortunately still don’t quite match after 5 years.  
She is used to a loose box, mixed herd, and is middle-ranked.  
Vaccinated, regularly dewormed, and shod every 6 weeks.  
When she gets stressed, she sometimes flicks her head (a mild form of stress headshaking), but when she is calm and relaxed, she doesn’t show this behavior.  
However, I am unable to provide her with the calmness and security she needs in the terrain, which is why she is looking for a person who can offer that tranquility for a sensitive horse. Unfortunately, I am not that person.