I have a good condition set for my 375 and they are pretty worthless. Always several sets on eBay (over here at least)
Mine is worth more to me up in the loft wrapped up than selling it, might get £30 if I'm lucky. They would only be worth average coin to a fellow collector looking to complete a machine IMHO.
Have you got any more pictures? It looks very nice. What cleaner is it for?