I HAVE BEEN OFFERED THIS LITTLE RIFLE IN THE ORIGINAL BOX. (WHICH IS A BIT TATTY AND SPLIT) THE GUN ACTION HAS SOME VERY LIGHT SURFACE PITTING.
THE REAR COMPRESSION TUBE END CAP IS MISSING AND THE STOCK VARNISH HAS RUBBED AWAY IN PLACES. THE ASI 4 X 20 SCOPE IS MISSING FROM THE ADVERTISED PACKAGE KIT. IT IS SHOOTING AT JUST UNDER 400 FPS WITH 11.9 grain PELLETS. WOULD MAKE A NICE DO UP PROJECT FOR A "JUNIOR'S FIRST GUN" OR A VERY LIGHT WIEGHT RATTER / PLINKER. LOOKING FOR AN HONEST VALUATION TO ADVERTISE IT IN THE FOR SALE SECTION.
I remember The Rangemaster package from the Marshall Ward's catalogue when I was a kid. My mate got one, and my Webley Hawk was more powerful.
From your description, I'd say that one's worth about £30.
For the full set in good nick, you could proobably double that.
Without the box and accessories though, it's just another ASI Sniper.
The South of England has 2 good things, the M1 and the A1. Both will take you to Yorkshire.