I had one of these many moons ago. Good reliable gun although engraving was a bit naff. Some of the lads on the pigeonwatch site
https://forums.pigeonwatch.co.uk/forums/ may be interested, but you may have to make a few other postings before you can sell.
£125 may be asking a lot these days as S/S guns are difficult to sell, and basically impossible to sell to a gunshop ("Nah mate, don't get any call for them, but I'll take it off your hands if you want to get rid of it")
Hope someone wants a nice cheap gun.

Never argue with an idiot, he will drag you down to his level and beat you with experience.