I guess I feel that is a bit much to ask for a dog that has done her job for you and is no longer good enough...
If I were a breeder and I were doing this for the money involved, I guess I would be overly concerned with an adult dog going to a good home. At that point, if they are no longer good enough for your breeding program, IMO, give them the best thing ever-a family that wants them. I wouldn't be so concerned about getting hundreds of dollars for her. Hasn't she already done enough for you? KWIM? I am NOT trying to be mean or rude, just giving my opinion.
If she were cheaper, I would drive from Ohio to get her. My mother is looking for a adult female yorkie right now.