Mine is no 147, My mate not long sold one for 250 with the knife, But , And a big but, The scope that was on it was worth more than that, It was to a mate though, Its a hard one really, Mine is still in box complete and I have asked the same question over the years but its only now that they coming of age where you don't see them very often, No real previous prices to go buy but boxed complete , knife etc, I would say £400/£450 , possibly £500 if someone wanted one bad, Seems a lot I suppose but most underlever guns now seem about that price new now, Only time will tell as they get older if they will increase or not,