A chap sees a sign advertising: "Talking Dog - $50". He knocks on the door and asks if he can see the dog, "sure" says the owner and calls the dog and leaves the room.
" So you can talk" says the chap
"Sure" says the dog
"That is amazing - where did you learn to talk" The chap asks

The dog responds "well I used to work for ASIO and I was trained to sit in and listen to conversations"
The dogs owner returns and the chap asks him "How come you only want $50 for the dog, he must be worth millions"
The owner replies in disgust "He hasn't been giving you that BS about working for ASIO has he?"