I would say that she would sell in the $4 - 7K range. Her best market is as a 4H or Pony Club all arounder or local show horse.
She looks to be a solid citizen and something I would want in my barn, however, she isn't typey or fancy enough to truly be competitive in rated shows (I'm sure she CAN show rated and put in respectable trips, but there's a difference between that and being competitive.) and that is what really increases price.
You also mention that "she is coming back into work", and that's a concern.
You will get more money for her if she is fit and show ready, but I understand that may not be possible.
Good luck selling her, whoever gets her will be lucky to have her.