What are you success rates for writing actors/actresses on movie sets?

IRCs are a waste of money to use in the states. It only costs $0.85 to send a regular letter to the states and if you use an envelope for 8x10 photos it costs $1.70. They IRCs do cost $3.50... I double checked today... (new at this stuff too) I live in Toronto and I just find someone in the states t...