Re-asked just to double check and quoted the part number on the body this time, 7700871215, which appears to have been superseded and going by my reg plate again still comes up around £340. If this is right, these were roughly 160 a few years back
I'd be better off with a single Jenvey for that price!
Not keen on buying a 2nd hand one as its highly likely it will have the same duff spring issue as mine although at these prices it could be a strong option.