Craigslist won't permit the sale of puppies...just the listing of dogs with an adoption fee. Mixed breed pups should not be sold, anyway. They should be adopted out to good homes for no more than $150 each. You may also ask local rescue groups if they're willing to do a courtesy post for you, but again, you cannot be looking to make a profit off of these pups. Please have your dog spayed and the puppies adopted out to good homes. Exit the world of dog breeding for good. It's no way to make money, especially if you're actually doing it right. Plus, my local shelters are full to the brim with chihuahuas and chi mixes.