It's always a "toughie" for me when I meet with a new client, and they tell me about their needs, and then look up and say "how much will that cost?".  That is such an unfair question 1 hour into the game, but it happens each and every time...and my answer usually is "between $30,000 and $1,000,000".  If nothing else, it breaks the ice and gives everyone a little chuckle.  And then they say "seriously, what do you think?".