Would consider trade for a sound safe beginner's/lesson horse max 14 years old and min 14.3hh.
This was in the ad for her. Makes me think she has issues, possibly more than she had when you sold her. If she has been passed around so much, there is a reason. I personally think your parents had the right idea when you owned her, if she is rearing, it can only get worse and usually does.
Keep the horse you have and enjoy her. I think this horse, older now and wiser to ways to misbehave for riders is an accident waiting to happen if it hasn't happened already.