A restaurant supply reclamation company should surely have the expertise and the responsibility, no?
Responsibility to do what? It's not their data nor their customers data on the stuff they're selling. They're just a buyer and seller of goods. As long as the equipment is not stolen and is in good working order when supplied to their customers they've met their responsibility. I'm not aware they have any responsibility to the former owners or their employees at all. Correct me if I'm wrong, though, I'm not a lawyer.