Or you do because you speak to the people who are owed money and clear it attorney to attorney before the purchase goes through. Then you stroke the pre-agreed to cheques and problem solved.
The owner was clearly stuck. He's happy to have everybody off his back and be left with something, albeit a smaller slice of cake than he was hoping and had to sell at a fire sale price because he didn't hold any cards.
Remember everything is negotiable if you know how to negotiate.