Several cases showing how one sells property for the sake of sustenance, but then is entitled to other monies. For example, a widow who sells or rents out the land that she's inherited for the same of regular income. Plus, the case of one who sells property and then wants to repossess it for her own ketubah! Also, what happens when one prepares to sell something for the needed cash - what happens if the seller no longer needs that cash? Is the sale null and void, or too bad for the seller? Also, 2 mishnayot! First, a widow can sell her husband's property without worrying about court - but a widow from betrothal needs to go to court. Furthermore, a woman who sold or mortgaged her ketubah needs to deal with court.