How much is a perutah actually worth? How do we define its value, given fluctuating currencies and given the different value of items in various places. Also, what happens when the value diminishes over time? Plus, how can some cases of actual effective kiddushin be valued at less than a perutah (Shmuel's opinion vs. that of R. Hisda). Plus, R. Hiya's wife's efforts to leave him.