I have one of the pistols and quite a few of the rifles have passed through my hands.
Someone had a shipment of the pistols about 10-15 years ago and sold them quite cheap, around 500Nkr, which would be less than 50Gbp with todays exchange rate.

The rifles were plentiful back in the post war era, and these and several CZ models were what my dads generation grew up with.
They seem to have become somewhat more collectible the last few years, but they can still be found quite cheaply along with chinese and old czech rifles at antique stores and car boot sales.

They are made in an era and place where air rifles were made the same way as firearms, with sturdy machined steel components all the way through. Stock screws sit in well made screw cups, and the parts are all quite well made. Not polished shiny like a Webley cylinder, but well machined and finished to an acceptable standard before bluing. The cylinders are well dimensioned, and I helped dad convert one of his rifles to a 28mm diana seal. We also changed the spring to one that fit the guide better, and sleeved the transfer port, which improved the firing characteristics.

Last year, I was given one of the rifles by a fried who has been dabbling in the antique trade. The only thing I did ecept cleaning and relubing, was to change the collapsed spring to a cut down HW77 spring that I think was taken from a Swedish 10joule gun. The 14,2mm spring fit snugly on the guide, and the gun is now placed at the family cabin and lives its life as a plinker there.