A good breeder will always take back their puppies/dogs no matter how old or for what reason. That is if your cousin is a responsible, ethical breeder. No one in their right mind is going to pay that much to take someone elses problems, especially at this age. (This is a bad comparison, but it still fits: you can't sell a used car for the amount you paid, so why does she think she can get her money back with these "pre-owned" dogs?) Papers are just a birth certificate, not a guarantee of quality, health, temperament, or genetics. I'm not directing this towards you LuckyDog, I understand you are trying to do the right thing for the dogs which is obviously more than your sil is doing. This is just what you need to be expressing to you them.

I agree with DDM, if she was so attached, she wouldn't care about money, she would care about finding them good homes. She shouldn't give them away for free (except to a rescue), but she shouldn't expect to get $350 each either. Try to bring her down on the price and then post this in Dog General. If she is willing to give them to rescue, contact a Pug rescue or post this in the Dog Rescue section. And yes, they need to be spayed before they go anywhere.