See, the thing is, there is no such thing as a cheap dog. Even though I paid a small adoption fee for my pup, within a week she was into me about $500. First, it's the food, beds, toys, and other starter paraphenilia.
Then, even though she seemed healthy when we got her, she got VERY sick. Parvo test, Xrays, antibiotics, blood tests... These really added up. Then tack on her spay, another $250.
Then there's general maintenance and emergency injury fund. Many people here have animals with previously broken limbs. Our dog go all out, and sometimes they get hurt just having fun. More money. Food costs me about $35 a month and toys are easily another $30.
So, when you ask about a cheap puppy, people may think you are not prepared for the full financial burden you are asking for. No puppy is cheap, is what I'm trying to say. Good luck finding what you are looking for.