Suppose I have an old refrigerator that no longer works. I don't want it, and would pay someone to take it; its value to me is negative. But my neighbor has an appliance repair company. My refrigerator has value to him for parts; he would pay me to give it to him. In this case, if we sign a contract saying that I give him the refrigerator but he doesn't give me anything, is there consideration?
In other words: if a single action is mutually beneficial to both parties, is that action on its own valid consideration?