What's really odd is the #S239***A isn't normal to any other No.4 rifle, but might be from an October 1945 Fazakerley No.5 carbine (Although the amount of digits and the "A" at the end of the serial number is non-conforming.) Something is amiss. The UF series unfired are worth a premium, but only if in completely original, authentic condition. If not in original condition, it is just an ordinary very good condition MkII. Caveat Emptor. The gun will never be a strong candidate for resale. I'd walk away.