I take mine to the pet store for credit. It works out well when I am low on rodents. I am producing fewer normals every year so it is a bit easier getting rid of the all now than it used to be.
Before I even breed for the season, I contact places that I know will want the normals and make sure that there is an understanding as to what I will have and how many.
Then I contact another, and another.
I make sure I have at least three options.
Then, the babies start coming.
You need to prepare for this kind of thing before the babies are here, or else you are doing the industry and yourself a disservice.