Well there is a little story about why he wanted one.
When he worked for a Agricultural engineers (20+ years ago) he was out at a farm eating his lunch in the cab, he noticed a block building and seen pipes coming out, went over and had a look and there was a single flywheel Ruston inside, well he tried to buy it and the owner wouldn’t sell, and he forgot where the farm is... ever since he has lusted over one, now he has bought one...plus he’s got 5 or so left working, and wants something for his retirement!
Like he said, he could buy this one and be others coming up left right and centre or he would leave it and not see another, plus this one was handy and it wasnt a million miles away!
One good thing is I get a WX11 back

will see if I can get this left to me in his Will...
Edit, there was also a 7HP on ebay which was removed from sale, but was starting at £3800.
Cheers Steve