AS an aside; the RFD in question once bought a quantity of L39's from the RAF Shooting Club, I believe most of them went very quickly because when I phoned up about a month after the his advert broke in the shooting press they had all gone.
Whilst on the phone his wife interupted the conversion and said that one had been put aside for a customer who had not returned for it, if I could get there quickly with the money it was mine.
The good news was that the original customer had gone through the lot of them and selected the most pristine example he could find.
I bought it the next day!