SOLD

in the film slr days there have been tests of 135 mm lenses and there this Pentzax lens was on the better side of the 3.5 lenses but couldn't compete with the K 2.5 and the better 2.8 lenses on the market (as there were Leica, Zeiss, Rollei, Mamiya, Nikon outperforming this little lens).
BUT:
You'll hardly find adaptors for those lenses to be used with K-mount.
Zeiss (for Contax, Yashica mount as well as Rollei QBM mount) as well as Leica lenses are at a very high price point now: you could buy yourself a new dslr + lens instead!
Often they are collectors items.

I really love the special character of this lens!
(Yes: I still if myself)

Congrats: Good job!

There will bei much more interested if you don't limit shipping (selling) just to UK....

I once had the Q and it's a joy to use it.
I sold it because my hands are a bit too big for this tiny camera.
Now I still have the battery charger Pentax D-BC68P and one battery.
If someone is interested....

Thanx for your experiences!
The Ricoh lenses where quite good ones but I have had some trouble with the old Ricoh KR-line cames:
The shutter causes much more shaking than with Pentax (MX), Chinon (CP5/6) or modern Ricoh (XR-X - probably the best).
BUT: using these old manual cameras causes much more mental focussing on composing a picture and thus making them often better, perhaps 'special'