If you know nothing, how come the sale is on behalf of the Bournemouth & District MES? Surely, there will be enough informed opinion available within a model engineering society, even if one of its members does not want to take over the project.
It looks like a very high standard of workmanship but I personally couldn’t put a value on it. Perhaps an auction site would determine its true value because, just like everything else, it is only worth as much as the buyer is willing to pay against how much the vendor is prepared to accept.