Rising accident on Toyota

Servus, I got described by a friend the following situation: He slipped to a Toyota with his Mercedes E200 Kombi at wet driving ban with approx. 20 or less km/h. This had a trailer coupling. In the Mercedes the license plate is pressed in at the place where it hit the trailer coupling. In the Toyota the trailer coupling has probably been slightly moved to the side and the lower apron has a small sheet metal damage. What can one do as a repair cost rec The Toyota owner thinks the workshop has hired an expert on its own and wants to x-ray the trailer coupling, which is more expensive than a new trailer coupling (more than 400€). Is that okay, or excessive and taking advantage of the situation? (On eBay I found couplings for just 130€…)