I clicked on "my posts" to update any replies and it moved me over to a new window with a very official looking "take our quick survey" spiel and I scratched my head.
I was going to copy it off and post it here when it suddenly vanished.
The cheapest way I can think is send it via bottle as in message in a bottle. Recycle a used wine bottle. Don't forget to add a note with the Nigerian address on it and secure the note INSIDE of the bottle. I'm sure if the bottle goes off course, any person finding the bottle with the $50 in will eagerly send both the bottle, the money, and the note to the correct address.