Bloody hell, mate, that's a blast from the past!! One of those was one of my first ever airguns many moons ago.
I remember it as being an OK rifle, those early Noricas were quite well screwed together unlike the tat they're making today. The trigger was a little heavy but crisp and very predictable and the gun was plenty good enough for hunting, I shot my first ever rabbit with mine
I can't help you on price, there's not too many of them about and I really can't remember the last time I saw one. Sorry...
Good luck with it, James.
Cheers.