Related על בבא קמא 15:3

If there is only the best property—they all (all of the categories of collection in the previous halakhot) collect from the best property. [If there is only the] average property—they all collect from the average property. [If there is only the] worst property—they all collect from the worst property. [If there is just] best and average property—damages are evaluated from the best; loans and a wife's ketubah from the average. [If there is just] average and worst property—damages and loans [are evaluated] from the average; a wive's ketubah from the worst. If he sold them [all 3 kinds of property] to one person, or to three people at the same time—they come under the [control of the] new owners, [which means that] damages [that have to be collected him, even from his buyer] are evaluated from the best property [that he sold him], debts from the average, and a wife's ketubah from the worst. If he sold them to three people at different times—even damages [can be evaluated] from the worst property and a wife's ketubah from the best property, [because] they collect from the last [of them, whichever one has the most recent claim]. If [that buyer] does not have [enough to pay the debt], they collect from the one before him; if [that second buyer] does not have [enough either], they collect from the one before the one that was before him.