This reminds me of a newbie mistake I made with one of these.
Roughly 7 or 8 years ago I returned to collecting aiming (see what I did there?) to lean towards vintage, and I came into contact with someone dealing in all sorts.
I showed a few of my collection that I still had from the previous ones I'd collected 15-20 years before and a .117 335 was one of them, in fine condition too.
He advised me they were rubbish, broke a lot and were impossible for spares so I ought to get rid but could give me £65, if I left the scope on!
I declined but put it in a local auction having been spooked by his advice, whilst disposing of my shot gun collection. It went for £85 less fees.
A year later I decided I wanted another so found one at a higher but probably still fair price of £130ish if I recall, not quite a good as my first one condition wise, each were the earlier version with the pull barrel release.
I had a similar bit of advice from him on another air rifle some time later and another person I know said the same, obviously low balls you with a scare story to acquire something of yours he fancy's so I don't deal with him anymore, my mind was made up having bought something he'd just serviced pre sale that I found full of steel wool. No doubt the service equivalent of wiping with an oily rag.
Steve
I've had Good deals & great info from many in this forum.