Evergreen in Cote dŽIvoire and Togo paid from 20 years ago until about a year ago $2,500 dollars a month plus about $300 dollars that was kept in escrow until you finished your contract which had to be for at least for a year. You were also given something like 1,000 dollars for living expenses which was enough to live on. A couple of tickes home a year and that was it.
There was never a problem finding people from all over the world to go there since it was great experience.