Fellow advertises that he has a talking dog for sale--for $10. Guy calls and goes to see the owner.

"So, the dog really talks?"

"Yes, indeed he does. He's around back. Go introduce yourself and have a conversation with him."

So the guy goes back and the dog says, "How DO you do. My name is Oswald, and yes, I talk."

The guys says, "Tell me about yourself."

The dog says, "Well, I was in the K-9 Corp of LAPD for four years. However, I was seconded to the Drug Squad. I tired of that and the CIA chose me do do some covert work in Iraq. I managed to get photos of their war plans and I passed them on to Washington. Later, I was sent into Russia to bring out a defector. I was finally taken back home to the USA and this kind gentleman bought me for $25,000."

The guy said his thanks and went to the owner. "Man, that dog CAN talk. Why are you selling him for $10?"

The owner said, "Because he's a fuckin' liar."