But I do not see any value apart from that. And how much it is worth to them, just depends on what they would pay for it. If anything. But if I was writing a query letter, I would pitch price depending on what their main website looks like. If they did not have a website, and were a small company, I would test the water at low xxx - with a quick wordpress business card site added in - telling them I would handover the keys etc., with domain.
But in general, I would say the domain is worth $0.