The eBay printouts are very useful. You can see which of the models was worth €10, and which were worth €200. The value will change over time. Probably down, u

The eBay printouts are very useful. You can see which of the models was worth €10, and which were worth €200. The value will change over time. Probably down, unless there are some very rare models. But it will give your friend some idea (and some terms to search for) when he contacts a local model railway dealer and asks for a quote. (Or lists everything on eBay himself.)