fair exchange is no robbery

"You can get anything you need here," Shamlack explained. "Longheads will adapt to whatever trade is needed at any given time and they have an excellent eye and mind for business. They are always honest, but don't ever expect to get anything for nothing -- you get what you ask for and nothing more or less than that." "Well, you know, fair exchange is no robbery," one of the Longheads chipped in, overhearing them.