There are good debt buyers. The website Strike the Debt (motto: “you are not a loan”) runs the Rolling Jubilee project.
The Rolling Jubilee is project of Strike Debt where we buy debts for pennies on the dollar. But instead of collecting on that debt like a debt collector would, we just abolish it.
So instead of trying to profit from you debt, Strike the Debt and the Rolling Jubilee are freeing you from it.